She was a guest performer at his second concert in Rio de Janeiro, singing her own song 'Who Says'.
Selena Gomez returned the favor for boyfriend Justin Bieber who popped out at one of her tour stops earlier this year. She was a surprise guest at Bieber's Rio de Janeiro concert on Thursday, October 6.
Hours before taking the stage for the second night in the city, Bieber tweeted, "Had a lil fun last night in RIO ... show #2 in RIO is 2nite ... got some very special guests with me 2nite. #Mistletoe." He later added, "Hearing @CobraStarship killing it out there ... almost time RIO ... i got a big surprise tonight. #BRAZIL #myworldtour."
Gomez appeared solo to sing the first half of her single "Who Says". Bieber joined her toward the end and the young couple embraced on stage briefly before Gomez left the stage. "RIO!!! CRAZY!! thanks to @selenagomez for helping me do something special for the crowd. a duet never hurt nobody. WHO SAYS," Bieber tweeted after the show.
Gomez was indeed spotted in town with Bieber on Tuesday. She was on backstage watching him perform the next night.