Don't you dare call Katy Perry "undecided"!

Unless you've been living under a rock lately (or just haven't visited the internet in a year, in which case, there's the door), you'll know very well that there's this little thing called a "presidential election" on. Shiz is getting down to the wire (Election Day is Nov. 6!), and while some celebs have chosen to tweet their thoughts during/after each debate, Katy Perry recently made her political preferences known at an Obama campaign rally at Doolittle Park in Las Vegas. And can we just say, she is NOT undecided!

Read more about Katy Perry's election dress after the jump.

Although we kinda had an idea all along who Katy would vote for, we're LOVING her choice of outfit for the Obama rally: a black-and-white latex ballot dress with each of the candidates names printed clearly on the front -- and obvs, with Obama's name marked as her choice. Perf choice of outfit, we think. After the performance, Katy tweeted the following: "So tonight was a great night! The PRESIDENT gave grandma and I unforgettable shout-outs & now I am officially 28! Best. birthday. Ever." Performing for the president the night before her birthday?? Gawd, we feel lucky if we just get a new sweater for our birthday (and an iPad, COUGH HINT COUGH).

Turns out Katy's feelings were mutual -- apparently Obama thinks Katy is "just a wonderful young lady." We absolutely agree, Mr. President! And we cannot WAIT to watch you chat with Sway Calloway tomorrow (Oct. 26) at 5 p.m. in MTV News' special "Ask Obama Live: An MTV Interview With the President." (BTW, if you want to submit questions for the president, just visit MTV's Facebook!) And do as Katy's dress says: VOTE!

+ Watch MTV News' "Ask Obama Live" airs Oct. 26 at 5 p.m. ET!

Photo credit: Getty Images