Hollywood's Single Ladies: Sexier than Ever!

Record rebound time! Less than a week after announcing her split from High Schoolsweetheart Zac Efron, the star showed some skin at her birthday bash, where she said of her ex, "We're good!" Since then, the actress has been spotted from New York Fashion Week to the Cannes Film Festival(where she looked super-glam in copper sparkles and Swarovski jewels), frequently on the arm of rumored beau Josh Hutcherson.

Following her split with husband Ryan Reynolds, the star indulged in a classic breakup move move: she dyed her hair red! She also stepped out in a variety of figure-flaunting frocks like this Roland Mouret dress, plus one key accessory: new beauSean Penn.

Bye, bye, Bradley! Just a month after parting ways with the Hangover star, theactress showed off her killer figure in strapless green Tommy Hilfiger dress and sky-high pumps. Pals say "she's doing good" post-split – and she certainly looks it!

After calling it quits with her love of five years, British actor Rupert Friend, Keira updated her lovely, ladylike style with more hipster-chic accessories (think brogues and denim jackets) – but proved she could still look smashing in head-to-toe Valentino.

Reports surfaced of the actress canoodling with a cricket player before her split from businessman Arun Nayar was announced – but she looked totally angelic in a rose J. Mendel one-shoulder dress and pink clutch for a party in N.Y.C. She's made the divorceofficial – and stepped out with that mysterious cricketer.

The singer shows her outlook is still bright a year after her secret split from her husband, music producer The-Dream. She hit an event in Beverly Hills in an ruched electric pink dress and strappy sandals, but she wasn't on the prowl for a new love – the star says sheloves being single.