GGGB was a great era. The singles had that multi-format appeal formula that Rihanna still applies today. Ironically, the only thing missing was the token West Indian dancehall/reggae track.
Umbrella, Shut Up and Drive, If I Never See Your Face Again: pop/rock appeal Don't Stop the Music & Disturbia: dance-pop appeal Hate that I Love You, Take a Bow, Rehab: pop/R&B Live Your Life &Umbrella: hip-pop.