Bocelli, Keys to sing before Champions League final

UEFA are introducing a longer curtain-raiser in a nod to the money-spinning advertising extravaganza which American Football's Superbowl half-time show galvanises.

The show and the match between Spanish sides Real Madrid and Atletico Madrid will be broadcast live in 220 countries.

"It's a great honour and I'll sing as best I can. Many thanks to all those who backed me in this," said Bocelli, who recently sang at Queen Elizabeth II's 90th birthday and English Premier League champions Leicester City's title celebration game.

New Yorker Keys has sold over 140 million records and is about to release a new album.

"Beyond excited (& even feeling a lil butterflies!!) to perform for 80,000 of you at the #UCLFinal 5.28.16," she tweeted this week.

UEFA spokesman Pedro Pinto added: "Fans can expect an incredible performance, which will be a tribute to the excellence of European football as well as the vibrant spirit of the host city, Milan."