On "Wait a Minute," British emcee/R&B songstress Estelle coolly proclaims, "You keep coming back 'cause the girl is tight." Truer words have never been spoken. The efforts of all-star collaborators like Wyclef, Cee-Lo, Kanye and John Legend are top notch, but she doesn't need them. She is luminous and versatile enough on her own. "More Than Friends" sums up the conundrums of modern love. "Magnificent" is a reggae-flavored walk on the beach; "Come Over" is a romp in the sheets. "Back in Love" is a deep-soul groove; the title track, produced by Swizz Beatz, pulses like a tribal-banger.