I know a lot always ask, so let's start making a list as a reference :)

Most popular right now:

Single Ladies by Beyonce

I think Saving Jane's Super Girl would be really cute for the bouquet toss!

Maybe even Christina Aguliera's "Keeps Gettin Better"?  I think the chorus would be perfect :) :) :)

I did the Sex in the City theme

I used "One Way Or Another" - Blondie

zz top - "she's got legs" ;)

EDIT: totally thought it was garter toss songs for some reason...

here are some bouquet ones:
+ cheryl crow - all i wanna do
+ cindi lauper - girls just wanna have fun 
+ martina mcbride - this one's for the girls
+ pat benetar - hit me with your best shot
+ weather girls - it's raining men

if we had done this, i would have demanded "Jump in the Line" by Harry Belafonte.... aka the song at the end of Beetlejuice when Winnona Ryder levitates/dances with the ghosts lol lol