What are some ideas for songs to sing for my competition that are jazzy/rockish?

Hi, well I'm a 14 year old girl, and I need some songs to sing for a competition. My voice is pretty strong, and the song "Somebody to love" by queen (glee version) was perfect for my range. I put my own jazzy spin on it and am looking for jazzy cly rock songs like that. I also really like Poker face acoustic version by lady gaga, so if you have any suggestions of songs like that with those ranges please help!! Thanks! :)