Jay-Z and Coldplay rang in 2013 together with a joint New Year's Eve concert at Brooklyn's Barclays Center on Monday night. Coldplay played the first set while Jay-Z took the stage shortly before midnight. Jay-Z and Chris Martin  joined up for the countdown and to sing "Auld Lang Syne." Once Chris was finished belting out the New Year's staple, he flowed into Jay-Z's "Run This Town," filling in for Rihanna 's chorus. While Jay-Z and Chris were rocking, Chris's wife, Gwyneth Paltrow , and their children, Apple and Moses, danced on stage. They weren't the only celebrities in the audience since Jake Gyllenhaal  was spotted chatting with Jay-Z backstage and Christina  Aguilera and her boyfriend, Matt Rutler, were also on hand. Once the concert was over, Chris and Jay-Z headed to the 40/40 Club  for an afterparty without Gwyneth, who headed home with Apple and Moses.
Jay-Z performed in Brooklyn on NYE.
Jay-Z and Coldplay performed a joint concert in Brooklyn.
Coldplay opened the NYE show.
Jay-Z wore a tux to ring in the New Year.
Jay-Z walked onto the stage shortly before midnight.
Christina  Aguilera and boyfriend Matt Rutler enjoyed the concert.
Jay-Z sang "Run This Town" at midnight.
Jay-Z was joined by Chris Martin  at midnight to count down the New Year.
Jay-Z performed at Brooklyn's Barclays Center.
Gwyneth Paltrow  and her children joined Chris Martin  and Jay-Z on stage at midnight.
Jay-Z performed on NYE.
Jay-Z co-headlined a concert with Coldplay.
Jake Gyllenhaal  chatted with Jay-Z backstage.
Jay-Z wore a blue and black tux.