Ooo la la!
Sin City just got a little naughtier!
This time, Lance Bass was chosen to join Brit-Brit on stage and he donned a pair of adorable kitty ears!
Judging by the look of the former boybander, he seems to be enjoying every moment of it!
When Britney made Lance get on his knees he thought to himself ______________________________________________!
[Image via Imgur.]