R5 faced off against The Vamps in a rock band chubby bunny challenge with You Generation! Get ready to see R5 vs. The Vamps!

R5’s songwriter-guitarist Rocky Lynch and singer-guitarist Bradley Simpson of The Vamps were both chosen to represent their bands because they have “big mouths.”

Watch the rival guitarists stuff their mouths with marshmallows and do their best to say the words “chubby bunny” while the rest of both bands watches on!

Both boys get all the way up to 13 marshmallows! Rocky has a clear lead for most of the game, but will he come out on top? You’ll just have to watch to find out!

Watch the new video below and tell us which band members you love the most! And if you love either R5 or The Vamps, be sure to join our communities at SweetyHigh.com!