I would choose Life is Beautiul by Sixx A.M., I love the song and it'd be perfect for any funeral. I might also choose
Don't Fear the Reaper by Blue Oyster Cult,
Foreplay- Long Time by Boston,
I Will Survive by Gloria Gaynor,
Dust in the Wind by Kansas,
Bohemian Rhapsody by Queen,
I Don't Wanna Stop by Ozzy Osbourne,
or Island In The Sun by Weezer.
Any of these will do. = )