GLENDALE, Ariz. -- "Bieber Fever" hit the Valley in more than one way on Saturday night.
Justin Bieber's first concert of his new "Believe" tour left many fans in a state of disbelief after the pop star twice vomited on stage during the show.
News of Bieber's sickness spread quickly as fans attending the sold-out concert at the Jobing.com Arena in Glendale, Ariz. took to Twitter and other social media platforms on the Internet.
Well-known radio personalities Johnjay Van Es and Rich Berra were with Bieber before the concert. Van Es confirmed to 3TV that Bieber did have to leave the stage twice during the concert after Bieber vomited on stage.
Van Es said that fans did some of the singing while Bieber was backstage. Bieber did manage to finish the concert, and he even performed an encore. Van Es said that when Bieber returned to the stage he thanked the fans for their support.
Van Es said that when he was with Bieber before the concert Bieber was complaining about feeling weak, but Bieber was eating nachos and drinking Gatorade.
Biber later tweeted "Great show. Getting better for tomorrow's show !!!! Love u"
“And .... Milk was a bad choice!” he added.
The “Believe” tour is scheduled for more than 45 cities before wrapping up in Miami, Florida on January 26, 2013 at the American Airlines Arena.
Bieber's next show is Sunday night in Las Vegas at the MGM Grand Garden Arena.
Johnjay and Rich can be heard in the Valley on 104.7 KISS FM. They also appear on 3TV'S "Good Morning! Arizona."
Great show. Getting better for tomorrow's show !!!! Love u instagr.am/p/QMJqjRAvlv/— Justin Bieber (@justinbieber) September 30, 2012