Selena Gomez shared some surprising news on Wednesday, while Shaun White shocked with a last minute decision in Sochi. Here are today's Need To Know stories.

Selena Gomez Secretly Spends Time In Rehab

News broke on Wednesday that Selena Gomez secretly completed a two-week stay in rehab last month. After cancelling the Australian leg of her "Stars Dance" tour -- and sparking rumors of a rekindled romance with Justin Bieber -- the "Come and Get It" singer checked in to Arizona's Dawn at the Meadows facility for an undisclosed reason, though her rep confirmed it was "not for substance abuse."

Shaun White Bails On Slopestyle At Sochi Olympics

The two-time gold medalist snowboarder said he won't be competing in the first Olympic run of the slopestyle competition as previously thought. Why? "To focus solely on trying to bring home the third straight gold medal in halfpipe."

His Canadian competitors threw him some light jeering about the last-minute pullout. "Mr. White... It's easy to find excuses to pull out of a contest when you think you can't win..." tweeted rival Sebastien Toutant.

Goodnight, 'Tonight'

After 21 years of hosting NBC's "The Tonight Show," Jay Leno will say goodnight for the last time on Thursday (February 6). The comedian will sign off with guest Billy Crystal -- his first ever "Tonight Show" guest back in 1992.

Madonna, Imagine Dragons Pay Tribute To Pussy Riot

Brooklyn played host to some of music's biggest stars at an Amnesty International concert on Wednesday night. The show, honoring punk protesters Pussy Riot, entertained while also calling for the removal of Russian president Vladimir Putin. Madonna spoke out against his mistreatment of the LGBT community while the two members of Pussy Riot read letters from protesters still in jail before calling for "freedom for all political prisoners." The concert, billed as "Bringing Human Rights Home," featured performances by Imagine Dragons, The Flaming Lips, Lauryn Hill and more.