Justin Bieber at Staples Center

The singer made his debut with the song “Baby” featuring rapper Ludacris in 2010.  (Lawrence K. Ho / Los Angeles Times)

The singer descended from above the stage attached to a pair of enormous steampunk-style wings.   (Lawrence K. Ho / Los Angeles Times)

Then he and his eight-piece band launched into “All Around the World,” the throbbing opener from this year’s “Believe,” while a crew of dancers raced through the crowd hoisting flags from various countries.   (Lawrence K. Ho / Los Angeles Times)

Fans swooning during a ballad.  (Lawrence K. Ho / Los Angeles Times)

The singer made headlines when he kicked off his tour in Arizona when he threw up onstage.   (Lawrence K. Ho / Los Angeles Times)

The projectile moment happened during “Out of Town Girl” at a Bieber concert in Glendale, Ariz.   (Lawrence K. Ho / Los Angeles Times)

Bieber made light of it after the Arizona gig, joking on Twitter that “milk was a bad choice,” a quote of from the Will Ferrell comedy “Anchorman.”  (Lawrence K. Ho / Los Angeles Times)

Bieber’s 2012 album “Believe” has sold 887,000 copies in the U.S., according to Nielsen SoundScan.  (Lawrence K. Ho / Los Angeles Times)

Briskly paced and intricately choreographed, this high-tech pop production (with a mixture of live and prerecorded singing) emphasized the idea of Bieber over the real-life person.  (Lawrence K. Ho / Los Angeles Times)

The 90-minute show included guest appearances by Carly Rae Jepsen, who opened the concert, and Jaden Smith.  (Lawrence K. Ho / Los Angeles Times)