12/14/2013 11:56 am ET Updated Jan 23, 2014

Celebrity Week In Review: Khloe Kardashian Files For Divorce, Demi Lovato Talks Drugs And More

Tonya Wise/Invision/AP

Welcome back to celebrity week in review, your watercooler cheat sheet. This week, Khloe Kardashian made headlines, as did her sister Kim Kardashian, as well as Demi Lovato, Katy Perry, Lea Michele and Beyonce.

After months of rumors and speculations, Khloe Kardashian decided to split from estranged husband Lamar Odom and filed for divorce on Friday, Dec. 13. The youngest Kardashian sister cited "irreconcilable differences" in the legal documents and is reportedly asking the judge to take Odom out of her last name. Khloe and Lamar were married for four years.

Khloe's older sister, Kim, wowed on the cover of Us Weekly this week in a white string bikini. "Kim feels confident again," a source told Us Weekly. "She worked really hard and is so motivated to stay fit."

Demi Lovato opened up to Access Hollywood in shocking detail about her drug-riddled past. Lovato, 21, admitted that she "couldn't go 30 minutes to an hour without cocaine, and I would bring it on airplanes. I would smuggle it basically and just wait until everyone in first class would go to sleep, and I would do it right there. I'd sneak to the bathroom, and I'd do it." The singer entered rehab in 2010.

And if it's candid interviews we're talking, Katy Perry also divulged in Marie Claire's January issue. "There were two weeks of my life after I found out the truth of my marriage [to Russell Brand] where I was like, 'OK. All right. I can't feel this. This is too intense right now.' I was, like, just eating Flamin' Hot Cheetos and drinking, and that's it," she said.

Perry also revealed Brand's desire for kids. "I knew I wasn't ready -- I think it was a way of control. I think it was part of, If I have a kid, then I would have to sacrifice -- I'd have to be home more. I really wanted to, but I knew I wasn't ready for it. It wasn't like, 'Hey, let's have a kid because we're in love.'"

Lea Michele was a guest on "The Ellen DeGeneres Show" this week and spoke candidly about her late boyfriend and co-star, Cory Monteith, whom she called the "greatest man."

"I really feel like I'm still trying to figure out all of this. It's been only a few months," she told the talk show host. "I think that at a certain point you can choose to sort of fall from this or you can choose to rise. I'm just trying to do my best for him, because I know that that's what he would've wanted."

Lastly, Beyonce proved yet again that she is queen of all things, when, completely by surprise, she dropped her new "visual album" on iTunes. Now you know what you're doing this weekend!

See the week's best photos:

Celebrity News & Photos
Celebrity News & Photos