How sweet would it be to go to your prom with a hot celebrity? Two high schoolers -- Alex from Atlanta, Ga., and Richard from Tampa, Fla. -- got the chance to do just that when they took Bobby Valentino and Rihanna to their proms, respectively -- and MTV filmed it all!

Check these too cute pics!

Once Upon A Prom airs on Saturday, May 19 at 2 p.m. ET/PT on MTV.