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Watch Lance Bass And Joey Fatone Betray NSYNC And Sing Backstreet Boys At Karaoke

Sometimes being at sea makes you forget which band you're supposed to be in

There are some party lines you just don’t cross: Coke vs. Pepsi, Democrat vs. Republican, Backstreet Boys vs. NSYNC. But being on a boat in the middle of the ocean can do some crazy things to your band loyalty, as former NSYNC members Lance Bass and Joey Fatone found out yesterday (April 14).

In the middle of his Dirty Pop at Sea cruise, Lance busted out the karaoke machine with his old pal Joey. They were so stoked to be singing together again that they didn’t even notice they had picked a song by the wrong boy band.

Well, Fatone might have realized by the very end of “I Want It That Way,” when he launched a not-so-nice insult against BSB that made even Bass balk.

Watch the boys act out on their cabin fever by completely forgetting which band they used to be in below.