Hollywood Headlines: A crazy week in review

Catherine Zeta-Jones checked herself into a mental health facility recently, seeking treatment for Bipolar II Disorder. The Oscar winner has been under immense stress as her husband Michael Douglas underwent treatment for throat cancer. “She went in for a few days because she’s about to start working, and wanted to make sure she’s in top form, which she is,” a friend told People.

Bipolar II is characterized by severe swings from depression to a milder and briefer manic state called hypomania.

ALSO: Catherine Zeta-Jones ‘Rebound’ movie remains AWOL  (Amy Sussman / Getty Images)

Scarlett Johansson and Sean Penn have moved in together in Malibu -- kind of a serious step for two recent divorcees. In any event, Penn’s pad should provide cozier accommodations than the West Hollywood hotel where ScarJo’s been staying since her split from Ryan Reynolds.  (Scarlett Johansson, credit: Charley Gallay / Getty Images; Sean Penn, credit: Dieter Nagl / AFP / Getty Images.)

It turns out Britney Spears is really into “S&M.” Who knew?

The pop princess paired up with Rihanna this week for a remix of RiRi’s mega-hit and even got her own verse in the song. Rihanna told the Z-100 radio station in New York she was looking to do something “major” with the mix and her fans wanted Britney. But that’s not all that’s going right in Brit’s life: She also found a replacement act (remember when Enrique Iglesias dropped out a few weeks ago?) for her upcoming “Femme Fatale” tour -- Nicki Minaj.  (Britney Spears, credit: Max Morse / Getty Images; Rihanna, credit: Jae C. Hong / Associated Press.)

Demi Lovato landed in rehab last year, but details were murky about her “dark period.” Now, she’s opening up to Seventeen magazine about her depression, cutting and eating disorder and the intervention that led her to an Illinois treatment center. The Disney star told the magazine, “I basically had a nervous breakdown. I was really bad off. My parents and manager pulled me aside and said, ‘You need to get some help.’ It was an intervention. I wanted freedom from the inner demons. I wanted to start my life over.”  (Kevin Winter / Getty Images)

Lady Gaga took a tumble onstage Sunday night, but slipping off a piano and nearly banging her head wasn’t enough to cancel the Houston show. Despite the slip, while wearing only a bra, panties and stiletto boots, Mother Monster kept right on singing “You and I.”

Aside from her tour, Gaga’s also been busy releasing new versions of her hit song “Born This Way,” prompting Dolly Parton to call for a country collaboration. “You know those GooGoo candy bars in Nashville? I could be Lady GooGoo,” she told E! News. GooGoo and Gaga? Sounds fabulous.  (Gene Sweeney Jr. / Baltimore Sun)

It appears that Ron and Hermione weren’t the only ones getting lovey-dovey on the set of “Harry Potter.” A real-life romance was brewing behind the scenes between Bonnie Wright (a.k.a. Ginny Weasley) and Jamie Campbell Bower (a.k.a. Gellert Grindelwald, and who also stars in “Twilight” and “Camelot”). Best wishes to the happy couple, who just announced their engagement.  (Ian Gavan / Getty Images)