Katy Perry is kicking off 2012 a single girl. Over the holiday weekend, news broke that Russell Brand had filed for divorce after a year of marriage with the pop star. And while Perry has remained low-key since the split, she is amping up for what is sure to be another busy year.

Perry hasn't been spotted in public since Friday's breakup announcement, but she did make some non-relationship-related headlines Tuesday (January 3) when a demo version of the Jessie James track "Bullet" hit the Net; Perry co-wrote the sassy track for the singer's 2009 album.

MTV's 2011 Artist of the Year has two shows later this month — one scheduled for January 19 in Jakarta, Indonesia, and another January 22 in the Philippines — as part of her California Dreams Tour. Come February, Perry is set to appear at the Grammys, where she is up for two awards, including Record of the Year and Best Pop Solo Performance for "Firework."

It's been nearly two years since Perry's megahit Teenage Dream album dropped. While no word has come down about new music from the star, when MTV News spoke to producer Tricky Stewart, he hinted that Perry was working on a new release of some older material, including a track called "Dressing Up."

"Katy and I went into [the studio] just to address some issues with records that we had done in the past that didn't end up going on Teenage Dream," he told MTV News about the top-secret project. "So we are in the process of just listening and freshening up things and getting ready for something special she has going on."

Perry hasn't announced plans to tackle any more acting roles, but in 2011, she made fans laugh on the big screen as the voice of Smurfette in "The Smurfs" and as the host of "Saturday Night Live" in December, teasing a possible second career in film and TV.

Since the split made headlines, Perry has not addressed the divorce. However, Brand said in a statement, "Sadly, Katy and I are ending our marriage. I will always adore her and I know we'll remain friends."