Each track really could be released as a single save Say It and Question Existing.
I still don't agree with SUAD as the second single.
I think she should've released
1) Umbrella
2) Good Girl Gone Bad
3) Lemme Get That (they shouldve called this "Furniture", when she sings that one word it's just

)
4) Hate That I Love You (not my favorite, but has HIT written all over it)
I LOVE Don't Stop the Music, but I don't think it would fair as well single wise.