Kellan Lutz
The Twilight star played Prince Charming to New Jersey teen Brianna Siciliano. Lutz even rented a Bentley convertible so the two could arrive in style!
Taylor Swift
In 2008, the "Bad Blood" singer appeared on MTV's Once Upon a Prom, where she chose a lucky fan, Whit, to go to his prom. The two took tons of photos together, ate fried chicken and even shared a slow dance.
Drake
The heartfelt rapper made 15-year-old Kennedy Brown's battle against brain cancer a little easier when he participated in a surprise prom and graduation ceremony. "Me and this beautiful angel Kennedy #kenfordrake," Drake wrote on Instagram.
Demi Lovato
Aw! The beauty followed through on a promise she made back in kindergarten to go to prom with longtime pal Nolan Narddechia.
Shaun White
When Philadelphia teen Carly Monzo didn't hear back after asking the Olympian to prom, she received the ultimate shocker when White and his band showed up after all.
Nina Agdel
Even though Kate Upton was his first choice for the dance, Jake Davidson didn't have a bad second option with this stunning supermodel. Agdel shared a photo on her Instagram, thanking Jake for being "an awesome date!"
Vanessa Hudgens
The actress turned Broadway star surprised Cesar Guerro, a 17-year old fan who was battling cancer, at a prom thrown especially for him. Cesar said, "It was the best night of my life."
Mila Kunis
Like Timberlake, the gorgeous actress attended the Marine Corps Ball in Greenville, N.C. with Sgt. Scott Moore.
Katy Perry
The "Teenage Dream" singer made a bunch of teens' dreams come true when she crashed and performed at a dance in Melbourne.
Rihanna
On another episode of MTV's Once Upon a Prom, the pop star danced the night away with her date, Richard.
Justin Timberlake
It wasn't prom that the sexy singer attended, but the Military Corps Ball with Cpl. Kelsey De Santis who was the only female serving at the Martial Arts Center for Excellence at Marine Corps Base Quantico.Timberlake said on his website that it was "one of the most moving evenings I've ever had."
Miley Cyrus
After the wild singer declined an invitation to prom because of scheduling conflicts, Cyrus took her invitation to the next level and invited Matt Peterson on stage, where she serenaded him with her song "Adore You."
Jason Derulo
Surprise! The R&B crooner shocked students at a Los Angeles high school prom when he performed a few songs. Wonder if he also flashed those abs...
Victoria Justice
A kiss on the first date! The actress surprised New Jersey fan Max Whitmore at school, and invited him to her show, since she couldn't come to the actual prom.
Justin Bieber
L.A.'s Chatsworth Charter High School allowed the Biebs to crash their senior dance. "[I] always wanted to go to prom," he tweeted after the dance. "Thanks for having me. #promcrasher :)"