Olivia Dean will headline the final day of BBC Radio 1's Big Weekend when it heads to Sunderland this year. The pop star will close out the Sunday along with former One Direction star Niall Horan and American singer Kehlani. Singers Zara Larsson, Louis Tomlinson and Lola Young are set to take to the main stage on the Saturday, while DJs Fatboy Slim and Sonny Fodera will kick off the festival on the dance-focused first day. The annual music festival will take place in the city's Herrington Country Park from Friday 22 to Sunday 24 May. Big Weekend will be Dean's first UK headline set, according to BBC Radio 1. The Man I Need singer cemented her position as one of the most exciting artists in the UK last month when she picked up four awards at the Brits, including best British artist. She also won best album for her soulful second record, The Art of Loving, as well as song of the year for her current number one collaboration with Sam Fender, Rein Me In.…