Whats a good song that will help you ask a girl?

Well, I don't really know what your looking for 'cause you didn't specify anything like genre, old or new, fast or slow but I have a few songs you can choose from:

Beautiful Soul - Jesse McCartney
About You - Jaicko Lawrence
Hallway - Vers'
Up To You - Chris Brown
Already Yours - Lil Eddie
Diagnosed With Love - Chris Brown
Statue - Lil Eddie

You can try:
Let Me Love You by Mario
Wake Me Up by Ed Sheeran
Kiss Me by Ed Sheeran
I'm Yours by Jason M.
Lego House Ed S.
Fall For You by Secondhand Serenade