Just some random stats, wasn't sure where else to put these.
Counting only the seven main Disney Mania albums (not including the remixes or the Princess repackaging), there are 105 songs, of which
The most covered movie is The Little Mermaid, which has 11 covers.
- Boo Boo Stewart - "Under the Sea" (The Little Mermaid) - 3:09
- Anna Maria Perez de Taglé - "Part of Your World" (The Little Mermaid) - 3:41
- Colbie Caillat - "Kiss the Girl" (The Little Mermaid) - 3:17
- Miley Cyrus - "Part of Your World" (The Little Mermaid) - 2:34
- Ashley Tisdale - "Kiss the Girl" (The Little Mermaid) - 3:24
- No Secrets - "Kiss the Girl" (The Little Mermaid) - 3:14
- Raven-Symoné - "Under the Sea" (The Little Mermaid) - 3:15
- Vitamin C - "Kiss the Girl" (The Little Mermaid) - 2:43
- Skye Sweetnam - "Part of Your World" (The Little Mermaid) - 2:33
- A*Teens - "Under the Sea" (The Little Mermaid) - 3:25
- Jessica Simpson - "Part of Your World" (The Little Mermaid) - 3:28
I'm not including
- Drew Seeley - "Her Voice" (The Little Mermaid) - 3:02
because that's kind of a grey area, having been written for the movie but only making it to the Broadway show.
The second most covered movie is The Lion King:
- Aaron Carter - "I Just Can't Wait to Be King" (The Lion King) - 3:26
- S Club - "Can You Feel the Love Tonight" (The Lion King) - 4:11
- Elliott Yamin - "Can You Feel the Love Tonight" (The Lion King) - 5:23
- Allstar Weekend - "I Just Can't Wait to Be King" (The Lion King) - 3:33
- Debby Ryan - "Hakuna Matata" (The Lion King) - 3:20
- Ronan Keating - "Circle of Life" (The Lion King) - 4:43
- Baha Men - "Hakuna Matata" (The Lion King) - 3:43
- Sara Paxton - "Can You Feel the Love Tonight" (The Lion King) - 3:40
- Disney Channel Circle of Stars - "Circle of Life" (The Lion King) - 4:10
Tied for third are Mulan, Tarzan, The Jungle Book, Pocahontas and Cinderella:
- Keke Palmer - "Reflection" (Mulan) - 3:39
- Everlife - "Reflection" (Mulan) - 3:42
- Keke Palmer - "True To Your Heart" (Mulan) - 3:25
- Christina Aguilera - "Reflection" (Mulan) - 3:34
- Raven-Symoné - "True to Your Heart" (Mulan) - 3:45
- Drew Seeley - "You'll Be in My Heart" (Tarzan) - 3:36
- Corbin Bleu - "Two Worlds" (Tarzan) - 3:35
- Teddy Geiger - "You'll Be in My Heart" (Tarzan) - 4:15
- Everlife - "Strangers Like Me" (Tarzan) - 3:32
- Usher - "You'll Be in My Heart" (Tarzan) - 4:12
- Smash Mouth - "I Wan'na Be Like You" (The Jungle Book) - 3:17
- Jonas Brothers - "I Wanna Be Like You" (The Jungle Book) - 2:47
- Selena Gomez - "Trust in Me" (The Jungle Book) - 3:25
- Bowling for Soup - "The Bare Necessities" (The Jungle Book) - 3:38
- Nikki Webster - "I Wanna Be Like You" (The Jungle Book) - 2:49 (Bonus Australian Track)
- Tiffany Thornton - "If I Never Knew You" (Pocahontas) - 3:00
- Vanessa Hudgens - "Colors of the Wind" (Pocahontas) - 3:58
- The Cheetah Girls - "If I Never Knew You" (Pocahontas) - 3:16
- Christy Carlson Romano - "Colors of the Wind" (Pocahontas) - 3:58
- Ashanti & Lil' Sis Shi Shi - "Colors of the Wind" (Pocahontas) - 3:46
- Nikki Blonsky - "A Dream Is a Wish Your Heart Makes" (Cinderella) - 4:01
- The Cheetah Girls - "So This Is Love" (Cinderella) - 3:39
- Disney Channel Circle of Stars - "A Dream Is a Wish Your Heart Makes" (Cinderella) - 3:46
- Kimberley Locke - "A Dream Is a Wish Your Heart Makes" (Cinderella) - 4:41
- Daniel Bedingfield - "A Dream Is a Wish Your Heart Makes" (Cinderella) - 3:40
Tied for eighth are 101 Dalmatians, Lady and the Tramp and Pinocchio:
- Selena Gomez - "Cruella de Vil" (One Hundred and One Dalmatians) - 3:20
- Hayden Panettiere - "Cruella de Vil" (101 Dalmatians) - 3:18
- Skye Sweetnam - "Cruella De Vil" (One Hundred and One Dalmatians)
- Lalaine - "Cruella de Vil" (101 Dalmatians) - 2:38
- Ruby Summer - "Bella Notte" (Lady and the Tramp) - 3:30
- B5 - "The Siamese Cat Song" (Lady and the Tramp) - 3:07
- The Beu Sisters - "He's a Tramp" (Lady and the Tramp) - 2:56
- Hilary Duff featuring Haylie Duff - "The Siamese Cat Song" (Lady and the Tramp)- 3:50
- Kate Voegele - "When You Wish upon a Star" (Pinocchio) - 2:45
- Jesse McCartney - "When You Wish upon a Star" (Pinocchio) - 3:03
- Ashley Gearing - "When You Wish Upon a Star" (Pinocchio) - 3:57
- N'Sync - "When You Wish upon a Star" (Pinocchio) - 2:22
Tied for eleventh are Hercules, Aladdin, Cars, Snow White and Song of the South:
- Lucas Grabeel - "Go the Distance" (Hercules) - 3:51
- K-Ci & JoJo - "Go the Distance" (Hercules)
- The Cheetah Girls - "I Won't Say (I'm in Love)" (Hercules) - 3:03
- Clay Aiken - "Proud of Your Boy" (Aladdin) - 2:19
- LMNT - "A Whole New World" (Aladdin) - 4:05
- Nick Lachey and Jessica Simpson - "A Whole New World" (Aladdin) - 4:11
- Honor Society - "Real Gone" (Cars) - 3:26
- Billy Ray Cyrus - "Real Gone" (Cars) - 3:32
- Drew Seeley - "Find Yourself" (Cars) - 3:21
- The Cheetah Girls - "Some Day My Prince Will Come" (Snow White and the Seven Dwarfs) - 3:27
- Ashley Tisdale featuring Drew Seeley - "Some Day My Prince Will Come" (Snow White and the Seven Dwarfs) - 3:31
- Anastacia - "Some Day My Prince Will Come" (Snow White and the Seven Dwarfs) - 3:45
- Aly & AJ - "Zip-a-Dee-Doo-Dah" (Song of the South) - 2:54
- Stevie Brock - "Zip-a-Dee-Doo-Dah" (Song of the South) - 3:30
- Miley Cyrus - "Zip-a-Dee-Doo-Dah" (Song of the South) - 3:06
Rounding things up with two covers each are Toy Story 2, Enchanted, Peter Pan, Lilo & Stitch and Brother Bear:
- Bridgit Mendler - "When She Loved Me" (Toy Story 2) - 3:15
- Jordan Pruitt - "When She Loved Me" (Toy Story 2) - 3:19
- Demi Lovato - "That's How You Know" (Enchanted) - 3:13
- Jordan Pruitt - "Ever Ever After" (Enchanted) - 3:12
- T-Squad - "The Second Star to the Right" (Peter Pan) - 2:51
- Jesse McCartney - "The Second Star to the Right" (Peter Pan) - 3:02
- Baha Men - "Hawaiian Roller Coaster Ride" (Lilo & Stitch) - 3:30
- Jump5 - "Hawaiian Roller Coaster Ride" (Lilo & Stitch) - 3:04
- Everlife - "Look Through My Eyes" (Brother Bear) - 3:11
- Jump5 - "Welcome" (Brother Bear) - 3:15
- Fan 3 - "It's a Small World" (RapMania! Mix) - 3:01
- Baha Men - "It's a Small World" - 2:44
And as for the rest:
- Mitchel Musso - "Stand Out" (A Goofy Movie) - 2:57
- KSM - "Good Enough" (The Wild) - 3:53
- Savannah Outen - "Little Wonders" (Meet the Robinsons) - 3:32
- Alyson Stoner - "What I've Been Looking For" (High School Musical) - 2:37
- Demi Lovato - "Gift of a Friend" (Tinker Bell and the Lost Treasure) - 3:26
- Mitchel Musso featuring Emily Osment - "If I Didn't Have You" (Monsters, Inc.) - 3:06
- Elijah Kelley - "He Lives in You" (The Lion King II: Simba's Pride) - 4:00
- Plain White T's - "When I See an Elephant Fly" (Dumbo) - 1:54
- Kaycee Stroh - "My Strongest Suit" (Aida) - 3:49
- The Go-Go's - "Let's Get Together" (The Parent Trap) - 2:36
- B5 - "Who's Afraid of the Big Bad Wolf?" (Three Little Pigs) - 3:32
- Jesse McCartney - "I'll Try" (Return to Neverland) - 3:51
- Anneliese van der Pol - "Candle on the Water" (Pete's Dragon) - 3:08
- Jonas Brothers - "Yo Ho (A Pirate's Life for Me)" (Pirates of the Caribbean) - 2:04
- Orlando Brown - "Super Cali (BoiOB Mix)" (Mary Poppins) - 3:32
- Devo 2.0 - "Monkey's Uncle" (The Monkey's Uncle) - 2:24
- No Secrets - "Once Upon Another Dream" (Sleeping Beauty) - 3:30
- The Beu Sisters - "Anytime You Need a Friend" (Home on The Range) - 3:20
- They Might Be Giants - "Baroque Hoedown" - 2:45
- Hilary Duff - "The Tiki Tiki Tiki Room" - 2:44
- Jump 5 - "Beauty and the Beast" (Beauty and the Beast) - 3:28
Kiss the Girl and Part of Your World are tied as the most popular song to cover, as it were.
My main take away from this is that The Little Mermaid is the most cover-friendly movie, and for some reason, Beauty and the Beast is not. IDEK.