Justin Bieber And Carly Rae Jepsen Perform At The MGM Grand

LAS VEGAS, NV - SEPTEMBER 30: Singer Justin Bieber performs at the MGM Grand Garden Arena as he tours in support of his new album, "Believe" on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)

Justin Bieber And Carly Rae Jepsen Perform At The MGM Grand

LAS VEGAS, NV - SEPTEMBER 30: Singer Justin Bieber performs at the MGM Grand Garden Arena as he tours in support of his new album, "Believe" on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)

Justin Bieber

(Credit: Getty Images)

(Credit: Getty Images)

Justin Bieber And Carly Rae Jepsen Perform At The MGM Grand

LAS VEGAS, NV - SEPTEMBER 30: Singer Justin Bieber performs at the MGM Grand Garden Arena as he tours in support of his new album, "Believe" on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)

Justin Bieber And Carly Rae Jepsen Perform At The MGM Grand

LAS VEGAS, NV - SEPTEMBER 30: Singer Justin Bieber performs at the MGM Grand Garden Arena as he tours in support of his new album, "Believe" on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)

Justin Bieber And Carly Rae Jepsen Perform At The MGM Grand

LAS VEGAS, NV - SEPTEMBER 30: (L-R) Singer Cody Simpson performs with Carly Rae Jepsen as Jepsen opens for Justin Bieber in support of her new album, "Kiss" at the MGM Grand Garden Arena on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)

Justin Bieber And Carly Rae Jepsen Perform At The MGM Grand

LAS VEGAS, NV - SEPTEMBER 30: Singer Justin Bieber performs at the MGM Grand Garden Arena as he tours in support of his new album, "Believe" on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)

Justin Bieber And Carly Rae Jepsen Perform At The MGM Grand

LAS VEGAS, NV - SEPTEMBER 30: Singer Justin Bieber performs at the MGM Grand Garden Arena as he tours in support of his new album, "Believe" on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)

Justin Bieber And Carly Rae Jepsen Perform At The MGM Grand

LAS VEGAS, NV - SEPTEMBER 30: Singer Justin Bieber performs at the MGM Grand Garden Arena as he tours in support of his new album, "Believe" on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)

Justin Bieber And Carly Rae Jepsen Perform At The MGM Grand

LAS VEGAS, NV - SEPTEMBER 30: Singer Justin Bieber performs at the MGM Grand Garden Arena as he tours in support of his new album, "Believe" on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)

Justin Bieber And Carly Rae Jepsen Perform At The MGM Grand

LAS VEGAS, NV - SEPTEMBER 30: Singer Justin Bieber performs at the MGM Grand Garden Arena as he tours in support of his new album, "Believe" on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)

Justin Bieber And Carly Rae Jepsen Perform At The MGM Grand

LAS VEGAS, NV - SEPTEMBER 30: Singer Justin Bieber performs at the MGM Grand Garden Arena as he tours in support of his new album, "Believe" on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)

Justin Bieber And Carly Rae Jepsen Perform At The MGM Grand

LAS VEGAS, NV - SEPTEMBER 30: Singer Justin Bieber performs at the MGM Grand Garden Arena as he tours in support of his new album, "Believe" on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)

Justin Bieber And Carly Rae Jepsen Perform At The MGM Grand

LAS VEGAS, NV - SEPTEMBER 30: Singer Justin Bieber performs at the MGM Grand Garden Arena as he tours in support of his new album, "Believe" on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)

Justin Bieber And Carly Rae Jepsen Perform At The MGM Grand

LAS VEGAS, NV - SEPTEMBER 30: Singer Justin Bieber performs at the MGM Grand Garden Arena as he tours in support of his new album, "Believe" on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)

Justin Bieber And Carly Rae Jepsen Perform At The MGM Grand

LAS VEGAS, NV - SEPTEMBER 30: Singer Justin Bieber performs at the MGM Grand Garden Arena as he tours in support of his new album, "Believe" on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)

Justin Bieber And Carly Rae Jepsen Perform At The MGM Grand

LAS VEGAS, NV - SEPTEMBER 30: Singer Justin Bieber performs at the MGM Grand Garden Arena as he tours in support of his new album, "Believe" on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)

Justin Bieber And Carly Rae Jepsen Perform At The MGM Grand

LAS VEGAS, NV - SEPTEMBER 30: Singer Justin Bieber performs at the MGM Grand Garden Arena as he tours in support of his new album, "Believe" on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)

Justin Bieber And Carly Rae Jepsen Perform At The MGM Grand

LAS VEGAS, NV - SEPTEMBER 30: Singer Justin Bieber performs at the MGM Grand Garden Arena as he tours in support of his new album, "Believe" on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)

Justin Bieber And Carly Rae Jepsen Perform At The MGM Grand

LAS VEGAS, NV - SEPTEMBER 30: Singer Justin Bieber performs at the MGM Grand Garden Arena as he tours in support of his new album, "Believe" on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)

Justin Bieber And Carly Rae Jepsen Perform At The MGM Grand

LAS VEGAS, NV - SEPTEMBER 30: Singer Justin Bieber performs at the MGM Grand Garden Arena as he tours in support of his new album, "Believe" on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)

Justin Bieber And Carly Rae Jepsen Perform At The MGM Grand

LAS VEGAS, NV - SEPTEMBER 30: Singer Justin Bieber performs at the MGM Grand Garden Arena as he tours in support of his new album, "Believe" on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)