Gwen Stefani''s new line of clothes, L.A.M.B., has all the hallmarks of the No Doubt singer''s style: bikini tops, Rasta-inspired colors, low-slung pants, even bum flaps.

Bum flaps? "That''s one of her signatures, she''s been wearing them for a while," her head designer, Annie Younger, said.

A bum flap is a piece of fabric that looks like half of a pleated skirt, and it can be attached to the back of pants, worn slung across one hip or stacked for a layered effect.

After designing a collection of L.A.M.B. handbags for LeSportsac, the spring collection will be the first try at a clothes line for the 34-year-old singer, who has also branched out into acting, playing Jean Harlow in Martin Scorsese''s upcoming "The Aviator."

Stefani''s style -- an amalgam of skater punk, street style and 1940s glamour -- is evident throughout the line.

Her music is incorporated into the clothes, with lyrics sewn into waistbands and vintage military-style patches that say "Just a Girl," from No Doubt''s 1996 breakout single, and "Hysterical Confession," a line from a song on No Doubt''s 2000 album "Return to Saturn."

One T-shirt is adorned with Stefani''s handwritten essay on the origins of L.A.M.B., which stands for "love angel music baby" and was also the name of a beloved dog.