Lady Gaga is my other modern mainstream pop culture obsession. She was the first pop star I ever really liked, as I became captivated with her throughout early 2010. She can be quite talented, even if some of her hits and some of her crazy behavior doesn't emphasize it. She can put on a great show - one of my favorite gigs was her headlining set at Lollapalooza 2010.
Because of her, I started listening to some other pop stars, but she's still my favorite in that genre. I listen to a huge variety of other music too - some of that may be material for another discussion.
I have the same username on the GaGaDaily fan forum (heck, I'm KingAlanI in a lot of places)