Jason Derulo has been added to the line-up for next year’s Rock In Rio Lisbon event.The festival, which was due to take place over two consecutive weekends over June 20-21 and 27-28 this year, was postponed until 2021 due to the coronavirus pandemic.Many of the initially confirmed acts have been carried over to 2021, including Post Malone, Liam Gallagher Foo Fighters, The National and Black Eyed Peas.Next year’s event will now be held on the weekends of June 19-20 and June 26-27 with Derulo