Happy birthday to Taylor Swift!

Now that the country crooner is of legal drinking age, Swift shares with Us just how she plans to celebrate.

"I want a Christmas-themed birthday, because I love Christmas as much as my birthday," Swift tells Us Weekly in Taylor Swift: Inside My World. "Combining the two just seems like the perfect festivity."

But don't expect her birthday to be a booze-athon. Swift says she's mostly looking forward to being allowed into the bars and clubs with her friends. "It'll be cool to get into the 21-and-over places my friends go to," Swift tells Us.

Don't think that she'll succumb to peer pressure: "I'm not like, "Free for all!" My friends drink, but I've never felt the need to," Swift said.

In fact, it looks as if she's saving her energy for the party. On Thursday Swift and man-of-the-moment, Jake Gyllenhaal, 29, were spotted on a leisurely drive in Beverly Hills.

Then, on Sunday, Swift enjoyed a low-key night with friends. "They brought a pizza with a lit 21 candle on it and bday hats," Swift Tweeted. Later, she had a dance party of one. "I'm dancing around my room alone to @pink's greatest hits cd," she Tweeted.