What’s round and cute and shiny all over? Jake Gyllenhaal‘s head! The actor, who usually flaunts quite a head of hair, was recently spotted on the Los Angeles set of his new film, End of Watch, with a totally shaved head. His rep tells DIDNTINVITEME that he did indeed lose his locks for the role, in which he and The Lincoln Lawyer‘s Michael Peña play devoted cops. This isn’t the first time Gyllenhaal has shaved his head for a film — he did the same for 2005′s Jarhead — but considering we saw him earlier this month with all of his hair (not to mention a full mustache and beard), it certainly was a quick change. We think the actor looks cute no matter what, but we want to know what you think.

Taylor Swift and Jake Gyllenhaal are starting 2011 single.

"They're over," a source tells our friends over @PEOPLE about the short-lived relationship. "It ended last month."

No reason was given for a split, and the stars reps didn't have immediate comment, but the two spent the holidays – and their birthdays – apart.

Swift, 21, rang in 2011 in Nashville, solo, at a party, while Gyllenhaal, 30, was in New York, where he attended a closing party for Broadway's Fela! on Jan. 2. While in the Big Apple, Gyllenhaal was also spotted dining with his mother at the Spotted Pig.

After spending Thanksgiving weekend together, the two were last seen publicly together on Dec. 9 in Los Angeles.

Gyllenhaal and Swift were first spotted together in October backstage at Saturday Night Live – followed by a brunch in Brooklyn. • Reporting by CARLOS GREER and KAY WEST

Jake Gyllenhaal (Getty Images)Jake Gyllenhaal has been romantically linked to Taylor Swift since October, and rumor has it he pulled out all the stops for her 21st birthday this month. 

A source told In Touch Weekly magazine: “It’s an Oscar-worthy bracelet -- nearly 30 carats of colorless diamonds set in white gold. It cost Jake about $100,000, but he wanted to do something special for Taylor’s birthday.

“They love coffee, so he sent her 21 pounds of the best Kona coffee available, along with a coffee grinder and a coffeemaker. And he made her a birthday card, as opposed to buying a generic one!”

As well as Jake’s efforts to please Taylor, the singer is also doing her best to make the actor happy, with her friends claiming she has even changed her style to suit her boyfriend’s tastes.

One insider explained: “She’s decided to get a more sophisticated look. She’s buying from stores like Chanel, Prada and Hermes.”

As well as the bracelet and the coffee, it has also been claimed that Jake paid $11,000 for a guitar signed by country music icon Chet Atkins for his girlfriend.

A source said: "He spent the weekend in Nashville with her and she saw the guitar in a tiny store which a lot of A-list musicians use.

"He was originally going to buy it just as a gift but it ended up being perfect for her birthday.”

Ancient Persia was one hot place.

In newly released images from his summer action movie Prince of Persia: The Sands of Time, which opens May 28, Jake Gyllenhaal shows off a seriously buff bod.

Gyllenhaal, 29, worked hard to bulk up for the role, for which he also trained in parkour (the sport of running, jumping and climbing over obstacles).

"It's a physical role," he told fans at the Wondercon convention in San Francisco earlier this month. "I never did anything this intensive before [to transform my body]. When you are committed, you are committed."

But hey, why not? Said Gyllenhaal: "It was so much fun to get paid to get tanned and get in shape."