Once merely a funny-hat-wearing antidote to John Mayer's Serious Rock Guy poses, Mraz has accrued a major fan base thanks to hits like ''I'm Yours'' and ''I Won't Give Up.'' Many of the hacky-sacking grooves on his fourth album settle for snoozy gentility. But he tiptoes the line on Love Is a Four Letter Word between hammock-strung wisdom and twee naïveté with such goofball charisma that otherwise forgettable love-each-other-doodles like ''Everything Is Sound'' become sweetly breezy anthems. B
Best Tracks:
Sly, jazzy 5/6
Colorful Frank D. Fixer
