Lady Gaga and Tony Bennett headline the 2015 Montreux Jazz Festival and Brazilian legends Caetano Veloso and Gilberto Gil will appear in a rare double billing.

The line-up for the July 3-18 event also includes veterans Santana, Herbie Hancock, Lionel Richie and Lenny Kravitz as well as Grammy-winning newcomer Sam Smith, the organisers said.

Lady Gaga and Bennett team up on July 6 in Stravinski Auditorium to perform tracks from their jazz album Cheek to Cheek.

“It’s a meeting of a crooner and Queen of Pop that really fits Montreux. They’ll be singing jazz standards,” festival director Mathieu Jaton told Reuters after the programme was announced in the Swiss city of Lausanne.

The 49th edition of one of Europe’s most prestigious summer festivals will be the second under Jaton, who succeeded the late founder Claude Nobs.

John Legend, fresh from picking up a Grammy for Glory in the civil rights film Selma opens the festival on July 3. Mary J. Blige and D’Angelo share the famed stage on July 8.

Smith, George Ezra and Sbtrkt are part of a “British invasion” this year, all playing at the Montreux Jazz Lab venue, Jaton said.

British multi-instrumentalist Jack Garratt is booked on July 10.