Watch: Backstreet Boys serenade *NSYNC's Lance Bass in Vegas
Josh Benson

The Backstreet Boys arranged for a (pretty low-key) battle of the bands at their Saturday night (March 18) show in Las Vegas. The guys invited none other than NSYNC's Lance Bass to join them onstage for the 2000 power ballad "Shape of My Heart."

The quintent pulled Bass out of the audience and proceeded to guide him around the stage and serenade him. BSB took to Twitter to celebrate the moment, writing, "We really showed [Lance Bass] the shape of our hearts tonight. Thanks for coming by [Backstreet Boys Vegas], brother!" 

Although heartfelt, the Boys actually pulled the same stunt on *NSYNC's Joey Fatone just a few weeks ago. Backstreet Boys' Larger Than Life residency at Planet Hollywood's AXIS Theater runs through July 1. Check out their special serenades in the videos above and below. 

You're tearin' up the shape of our hearts tonight @realjoeyfatone ❤️

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