Backstreet Boys AJ McLean and Kevin Richardson at “Britney: Piece of Me” at Planet Hollywood Resort & Casino

Backstreet Boys AJ McLean and Kevin Richardson at "Britney: Piece of Me" at Planet Hollywood Resort & Casino
Spotted Friday night at Britney Spears’ resident headlining show, Britney: Piece of Me at The AXIS at Planet Hollywood Resort & Casino in Las Vegas, was AJ McLean and Kevin Richardson of the Backstreet Boys (Pictured: AJ McLean, Britney Spears and Kevin Richardson – Photo credit: Kodak at Caesars Entertainment)

AJ and Kevin reunited with Britney backstage prior to the show to visit and take a photo. Then, Britney brought AJ, who appeared on “Lip Sync Battle” Thursday night, on stage to be the “victim” during her infamous “Freakshow” number.