Justin Bieber and Rihanna looked like the best of friends while watching Sunday's NBA All-Star game at Los Angeles' Staples Center, and Breaking Celebrity News has the pictures for you.

The 16-year-old Baby singer and the Umbrella hit-maker, who turned 23 Sunday, looked to be like brother and sister as they laughed and smiled with one another while taking in the high-scoring game, which was won by NBA sensation Blake Griffin and the Western All-Stars.

VIDEO & PHOTOS: Rihanna Rocks The House At NBA All-Star Game

While neither attempted any earth shattering slam dunks, both entertainers were involved in the weekend’s festivities, with Biebs playing in a celebrity game while RiRi put on a sexy performance at halftime.

The Canadian heartthrob’s video for Baby is the most viewed-ever on YouTube, garnering more than 469 million hits since February 19, 2010.