Rihanna, Shakira, Bon Jovi and the Prodigy are among the first artists confirmed for two of Spain's most important summer festivals.

Both the 16th International Festival of Benicassim on the eastern Mediterranean coast, known as FIB Heineken, and Rock in Rio Madrid, announced their first batches of artists on Jan. 29.

FIB Heineken's bands playing at Benicassim between July 15-18 include the Prodigy, Kasabian, PiL, The Specials, ex-Stone Roses singer Ian Brown and Dizzee Rascal.

Promoter Vince Power said that "after the huge success of 2009's sold out festival, I'm looking forward to having the same success this year." More than 50,000 people a day attended the 2009 FIB Heineken, and organizers Maraworld say more than half the fans come from the U.K. and northern Europe.

Previous FIB Heineken performers include the Killers, Kings of Leon, Leonard Cohen, Oasis, Morrissey, Babyshambles, My Bloody Valentine and Franz Ferdinand, although there are always some Spanish artists on the bill.

The Rock in Rio festival was born 25 years ago in Rio de Janeiro on Jan. 11, 1985, and subsequent events in Lisbon and Madrid have been arranged by the original founder, Brazilian Roberto Medina.

The first RiR Madrid was held in 2008. This year's festival will take place over June 4-5, and June 10-15, again at Arganda del Rey, 17km from Madrid.

Bon Jovi will close the first day's action on June 4, in what will be the group's only concert in Spain this year, and the first in Madrid since 2003.

Shakira, who repeats at RiR Madrid after closing the third day in 2008 in front of 75,000 fans, also plays Rock in Rio Lisbon which precedes the Madrid event on May 21-22 and May 27-29. Muse is also confirmed for the Lisbon event.

Both Shakira and Rihanna play on June 5, and for Rihanna it will be one of the first concerts of a world tour to promote her latest album, "Rated R."

Some 290,000 people attended the 2008 RiR Madrid, whose so-called 'Rock City' covers 200,000 square meters.

Meanwhile, South Korean electronic and digital equipment company LG Electronics has become the latest sponsor to back Rock in Rio Madrid 2010. Other sponsors include Mexican beer maker Coronita, Spain's biggest department store chain El Corte Ingles, and Burger King.

Rock in Rio festivals have been held in Brazil, Portugal and Spain so far, attended by nearly 5 million fans, says founder Medina, but he plans future festivals around the world.