Lindsay Lohan/TwitterGuess what Lindsay Lohan did this weekend? No, she didn't throw a drink at someone at the Chateau or wherever. She got her yellowing teeth fixed -- then posted the blindingly white results to her WhoSay account.

"Thanks Dr. Dorfman for the zoom ... My gums are so sore though!" wrote Lohan, flashing a Taylor Lautner smile.

Jon Kopaloff/FilmMagicSinead O'Connor has surfaced again -- this time, she looks more like herself. The '90s icon went back to the baldness of her heydey, debuting a super-close crop at an Amfar gala in Los Angeles on Thursday night.

Previously: O'Connor, 42, was photographed two months ago in her native Ireland looking virtually unrecognizable with a fuller figure and mullet-y shag haircut. And glasses.

Amanda NowakThe kid from "Jerry Maguire" is all grown up.

Last weekend, Jonathan Lipnicki celebrated his 21st birthday in Las Vegas (that's him alongside DJ Steve Aoki at Sin City's Surrender nightclub, where Lipnicki and his entourage of cousins downed shots and Grey Goose cocktails.)

Now out of his teen years, Lipnicki -- fully determined to make the transition into Ryan Gosling territory -- has lined up roles in two adult movies: "For the Love of Money," a crime drama about the Israeli mob ("I had to get my hair permed for it"), and "Tag," a dark thriller centered on a gang of homeless kids. (He plays "the brains of the operation.") He's also got a blink-and-you-miss-it cameo in the popular Funny or Die spoof "Shark Pool," which is clicking like crazy on Youtube.

In light of these events, we thought it was a good time to check in with the birthday boy himself. He called us -- sober --  from his Los Angeles home:

Melissa McCarthy, tough parent. (Theo Wargo/NBCUniversal/Getty Images)Parents never want their kids to make the same mistakes they made as adolescents, but it sounds like Melissa McCarthy really doesn't want her daughters to follow in her footsteps, and she already has an extreme intervention method to prevent it.

The "Bridesmaids" breakout star said she went through a goth phase while she attended a girls-only Catholic high school in Illinois. "There was a three-year chunk as a teen where I should have been tranquilized and put in a cage ," she told Entertainment Weekly.

Ever wonder how Madonna and her 15-year-old daughter Lourdes get along? In this behind-the-scenes video, you can see that being the best-selling female recording artist on the planet still doesn't make your teenage daughter take you seriously. Like any teenage master of indifference, Lourdes texts and snacks while her mother tries to talk business about the fashion line they're launching together. (Well, it's a normal thing to talk about for any teenager in the wealthiest 1%. Or really, the wealthiest .0001%.)

Ashton Kutcher is a giant mess of contradictions: on one hand, he's a self-promoting, mild-to-moderately irritating actor who allegedly cheats on his wife, Demi Moore, and then films inappropriate Nikon commercials; on the other, he's a vocal and passionate crusader against human trafficking. Check out this clip of Kutcher getting choked up while receiving an award for his humanitarian efforts at the GQ Gentleman's Ball in New York:

ToddlewoodBehold this snapshot from Ellen DeGeneres and Portia de Rossi's 2008 wedding: they look so happy! As do their toddler counterparts.

Tricia Messeroux, a photographer based in Long Island, N.Y., is making a splash with her photo project, "Toddlewood," wherein she casts kids ages 3 through 6 to recreate classic Hollywood moments, a la DeGeneres' marriage to longtime life-partner De Rossi. Other memorable scenes: mini-Tom Cruise jumping on Mini-Oprah's couch; mini-Audrey Hepburn in "Breakfast at Tiffany's; mini-Madonna from the "Like A Virgin" album, and mini-Barack Obama from the presidential Inauguration.

Gilbert Carrasquillo/Getty ImagesFirst the Michael Lohan drama. Now this: Kate Major is getting evicted from her Florida condo due to all the media attention on her domestic-violence dispute with Lohan, TMZ reports.

Apparently, Major's neighbors are none too pleased with the prowling photographer on the premises, so the luxury building in Tampa has given her until Nov. 1 pack up -- and get out.