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21 March 2012, 11:11 | Updated: 21 March 2012, 11:19
The 'Warzone' stars gave a powerful and rousing rendition of their hit song in the chat series yesterday.
The Wanted were joined by an array of female fans who came on stage during their commanding performance of hit single 'Glad You Came' on The Tonight Show With Jay Leno last night (20th March).
The 'Lightning' stars made the highly anticipated appearance on the chat show's series and welcomed the swarm of females that made their way on stage.
The band looked stylish and gave a slick rendition of their song which they also performed on their US TV debut on the Ellen DeGeneres Show earlier this year.
The group took to their Twitter account in the day to say how "excited" they were ahead of the performance and also uploaded a picture of themselves with Jay backstage.
You can view a picture of The Wanted with Jay Leno below: (Picture: Twitter)
The group have completed their first ever US tour and are back in America due to popular demand and to make a series of new appearances including on MTV's Spring Break.
The band were mobbed by fans as they arrived back in Los Angeles earlier this week and posed with their adoring followers who greeted them at LAX airport.