Ask and the internet will give. In fact, you don't even need to ask and the internet will give anyway. Which is exactly what's happened with the very accurately named tumblr Celebrities as Drag Queens.
There's not much to explain really, other than the site's author photoshops celebrities to look like drag queens. It's kind of ridiculous, but this is the internet, ridiculousness is its default state.
Also, don't be disheartened if you had a celebrity in mind that you wanted to see in drag but they weren't on the tumblr, because the tumblr's author is taking requests. Current suggestions include: Quentin Tarantino, Ricky Gervais, and JK Simmons.
Because, lets face it, applying some excessive color and oversized fake lips on famous celebrities faces definitely makes for some entertaining Internet lolz.