The bluesy guitar riff is wicked, but anyone shameless (and witty) enough to write “I love you like a fat kid love cake” is aware of what he’s doing. 50 is one of the cleverest lyricists since the snoopy-dee-oh-double-gizzle, even if he acts like a straight-up fool. Tuesday night (April 29) he’s in da club, meaning the Richmond Coliseum, at 8 p.m. $27-$40. For tickets, check the Coliseum Web site, www.richmondcoliseum.net. — Wayne