JUST ADDED: 5 Seconds of Summer will be rocking the stage at this year's iHeartRadio Music Festival Village in Las Vegas! The band sat down with Ryan Seacrest to break the news. Click here to buy your tickets now, before they sell out!
The Backstreet Boys may very well be the ultimate boy band, celebrating their 20th anniversary this year. But how well do they know the other boy bands?
The guys stopped by Q102 in Philadelphia where they were put to the test! From Jackson Five to 98 Degrees to New Kids on the Block, to even the newer boy bands like One Direction - find out if the Backstreet Boys can recognize their fellow boy bands of past and present (and hear them sing their songs too!).
Watch them perform their single 'In a World Like This' acoustic for the first time!