Dua Lipa wowed 70,000 fans at Wembley Stadium during her 'Radical Optimism' Tour by bringing out Charli XCX as a surprise guest.

The 29-year-old pop star thrilled the roaring crowd of 70,000 when she introduced the British pop sensation, 32, with a cheeky shoutout.

Dua Lipa, the British singer and songwriter, has come a long way since her humble beginnings as a refugee from Kosovo. Born ...