The English R&B singer Marsha Ambrosius first caught America's attention as Floetry's singing half (remember the single "Say Yes"?). Since then, she's penned songs for Alicia Keys and Jazmine Sullivan. Ambrosius, who plays Rams Head Live Sunday night, struck out on her own this past March with her debut solo album, "Late Nights & Early Mornings." It's a seductive album with enough surprises to keep things interesting: she covers Portishead's "Sour Times" and first single "Hope She Cheats On You (With a Basketball Player)" is as sharp-witted as the title sounds. Memorable soul albums don't happen as much as they use to, but Ambrosius' knows smart songwriting leads to staying power.