Jonas Brothers JonasBrother081208_01_X17.jpg With anticipation for their third album A Little Bit Longer reaching a fever pitch, the Jonas Brothers stepped out last night for a little last-minute promotion. Don't worry, guys - we'll eat our hat if A Little Bit Longer doesn't conquer the charts!

In fact, the JoBros have plenty of other celebrities stumping for their latest album - for example, Selena Gomez! "Go buy their album!" the Disney darling exhorts her fans in her latest YouTube video (with the help of buddy David Henrie from Waverly Place). "And if you've already bought it, buy another one. And if you've already bought another one, get another one after that!"

Hey, we're with Selena on this one - we still can't get enough of "Burnin' Up"!