Honestly? Have two or three "modern" sounding or Pop/Adult-Contemporary songs ready. They almost always ask people who do jazzy/blues stuff to sing something contemporary. The only person I can think of who got by without having to sing a modern song after an older number was Kat McPhee, actually. Haha.

OMG BREAK A FRIGGIN LEG. I love AI! AND I LOVE YOU! MUAH!

_{PS: Are you aware of how the audition process works for AI? Because it's nothing like what's presented on TV. I'm sure Noah told you, though.}