I know ALL the sororities can claim this one, but our chapter loves "We Are Family". Of course, for us it's "We Are Alpha Phi". Whenever we were at formal or even out in bars or clubs, if my boyfriend heard this song, he would say, "Oh it's the Alpha Phi song again" and get out of the way so I could sing and dance with my sisters.
We also loved "Back That Ass Up" by Juvenile. "We're some fine Alpha Phis, won't you back that ass up!"