Justin Bieber and Selena Gomez sing together in Brazil
- Photo: Carlo Allegri/Invision/AP1 of 13
- Photo: @selenagomez/Twitter2 of 13
- Photo: WENN3 of 13
- Photo: Kevin Mazur/WireImage.com4 of 13
- Photo: justinbieber/Instagram5 of 13
- Photo: Bauer-Griffin6 of 13
- Photo: Steve Granitz/WireImage.com7 of 13
- Photo: Judy Eddy/WENN8 of 13
- Photo: @justinbieber/Twitter9 of 13
- Photo: Splash News10 of 13
- Photo: WENN11 of 13
- Photo: Donald Traill/Invision/AP12 of 13
The teenage pop star is currently touring South America and Gomez joined him during his stop in Brazil for some sightseeing.
They took a helicopter ride together in Rio on Tuesday, Oct. 4, and on Thursday, Gomez joined him onstage during his show at the Estadio do Engenhao.
The couple sang a duet of Gomez's hit track Who Says, and after the show, Bieber thanked his girlfriend for her efforts in a post on his Twitter.com page.
He wrote, "Rio!!! Crazy!! Thanks to Selena Gomez for helping me do something special for the crowd. A duet never hurt nobody. Who Says."
DIY Celeb Makeup
Find out how to get Jenna Dewan Tatum's long-lasting matte lip on DIY Celeb Makeup.Watch Video »
Perry in Peru
Tats for Love
From Heidi Klum and Seal to Ryan Sweeting and Kaley Cuoco, see which stars got tattoos for love.Watch Video »
'Pitch Perfect 2' Los Angeles Premiere
Check out all the celebs who chatted with Wonderwall.com's Kirby Kristen at the "Pitch Perfect 2"...Watch Video »
Real 'RHOC' Dish
ET found out what Julianne Hough's romance is like with her real-life boyfriend Ryan Seacrest.Watch Video »