Gwen Stefani poses some big questions on "Push and Shove," the first album in 11 years from her SoCal ska-pop band No Doubt. "What happened to us?" she wonders in the shimmering, neo-new wave "Undercover," while the bass-heavy "Sparkle" finds her asking, "Do you remember how it was?" Yes, it's been a virtual lifetime in pop since we last heard new music from No Doubt, which rocketed out of Orange County with 1995's gazillion-selling "Tragic Kingdom" and went on to become one of that decade's most important acts. And though the band's influence is clear in the glossy, vividly omnivorous work of fresh-faced stars like fun. and Carly Rae Jepsen, Stefani and her bandmates sound fully aware of the precarious position they're in now. At its best, "Push and Shove" channels some of the infectiously restless energy of "Rock Steady," the band's pre-hiatus farewell. And it further polishes a bold mix-and-match aesthetic that feels familiar today in part because of records such as "Tragic Kingdom." Gibson Amphitheatre, 100 Universal City Plaza, Universal City. 7:15 p.m. Sat. $74.50-$125. http://www.livenation.com.