Showing her boys what a rockstar their mommy is, Gwen Stefani was spotted outside the “Jimmy Kimmel Live!” studio in Hollywood last night following a live performance (May 18). The “Hella Good” songstress held her oldest Kingston (almost 3 yrs old) in her arms as she chatted up the paparazzi and signed autographs. Meanwhile, her youngest Zuma was tended to by a nanny, and it looks like he was trying to keep up with his big brother’s funky hairstyle by sporting a faux hawk of his own. Gwen recently reunited with her band No Doubt and kicked off a major North American tour ahead of recording a brand new studio album.