Rihanna: 'Diamonds World Tour' Backstage Pictures (Exclusive)

Rihanna flashes a smile as she strikes a pose backstage after performing at Staples Center for a stop on her Diamonds World Tour on Monday (April 8) in Los Angeles.

“#CITYofANGELS all my nigg-z in da building!!!,” the 25-year-old singer wrote on her Twitter account. “#DiamondsWorldTour #LA tonight is already MAJOR!! #2ndHeauxmTing.”

PHOTOS: Check out the latest pics of Rihanna

Celebrities in attendance included: Chris Brown, Kristen Stewart and beau Robert Pattinson, Elle Fanning, Chloe Moretz, Colton Haynes, Ashley Benson, Ellen Pompeo, Riley Keough, Nicolas Hoult, Rosie Huntington-Whiteley, Kirsten Dunst, Wilmer Valderrama, Sia, Jesse Metcalfe, Kendall and Kylie Jenner, Naya Rivera, Kevin McHale, and JustJared.com‘s Jared Eng.

FYI: Rihanna is wearing rag & bone‘s Jefferson Blazer.

25+ pictures inside of Rihanna performing at Staples Center…