Lady Gaga has thrilled fans by confirming she has penned a follow-up to her huge hit track Telephone. The Poker Face superstar released the tune, which featured Beyonce, in 2010. It was a sequel to her hit Paparazzi, and the Thelma & Louise-inspired video, directed by Jonas Akerlund, reached cult status with her followers, amassing more than 173 million views on YouTube.com. Gaga has now revealed she will work on a third track to complete the trilogy, which will be performed in London at the iTunes Festival on 1 September (13). She tells U.K. radio station Kiss FM, "It is surely coming. I'm very excited to be filming it and doing it. I will say that one of the songs I will be playing at the Roundhouse is meant to be the continuation. "I'm very excited about it. The Telephone video and working with Jonas Akerlund - for Paparazzi as well - was such an incredible experience. To finish this trilogy will be great as I know how much the fans want it. We've already written it, so it's going to be fantastic." The song will appear on her third studio album, ARTPOP.