Lady Gaga Performs at the iHeartRadio Music Festival (video)

Lady Gaga looks elegant backstage during the second day of the iHeartRadio Music Festival held at the MGM Grand Garden Arena on Saturday (September 24) in Las Vegas, Nevada.

The 25-year-old singer talked to Z100’s Elvis Duran backstage before hitting the show and told him that she and her alter ego Jo Calderone are not on speaking terms.  “Who does he think he is going on national television and speaking about my personal life like that? He’s a sucker,” Gaga said, referring to Jo’s performance at the 2011 MTV Video Music Awards.

Gaga performed many of her hits during her set including “Bad Romance,” “You and I,” “Judas,” “Just Dance,” “Poker Face,” “Lovegame,” “Paparazzi,” “Alejandro,” and “Scheibe.” She also dedicated a performance of “Hair” to 14-year-old Jamey Rodemeyer, who ended his life earlier in the week after being bullied.

Lady Gaga Performs “Alejandro, Telephone & Paparazzi” at the iHeartRadio Music Festival Video

http://youtu.be/SpnaL2DVynM

Lady Gaga & Sting Performs “Stand By Me” at the iHeartRadio Music Festival Video

http://youtu.be/dEHf0ll9bQg

Lady Gaga & Sting Performs ‘King of Pain’ at the iHeartRadio Music Festival Video

http://youtu.be/6xQoOl66sY8

Lady Gaga Performs “You And I” at the iHeartRadio Music Festival Video

http://youtu.be/Jykw_ylUhE8

Lady Gaga Performs “Poker Face” at the iHeartRadio Music Festival Video

http://youtu.be/-HjNx-3Sf7Q

Lady Gaga Performs “Edge Of Glory” at the iHeartRadio Music Festival Video

http://youtu.be/6Z2sLsQgvs4

Lady Gaga Performs “Hair” at the iHeartRadio Music Festival Video

http://youtu.be/LCjxE2XDjro

Lady Gaga Performs “Judas” at the iHeartRadio Music Festival Video

http://youtu.be/D0AGbw4uvQI

Official Music video by Lady Gaga performing Judas

Lady Gaga Performs “Just Dance & LoveGame” at the iHeartRadio Music Festival Video

http://youtu.be/2-C9Sv-0z3c

Official Music video by Lady Gaga performing Just Dance & LoveGame

Lady Gaga Performs “Bad Romance” at the iHeartRadio Music Festival Video

http://youtu.be/CruzvNX6O7I

Official Music video by Lady Gaga performing Bad Romance