 Complete the following phrase:  Between 1987 and 2005 Nava entered the competition at the Sanremo Festival eight times, ranking third in 1999 with the song Così è la vita. As a songwriter, she collaborated with Andrea Bocelli, Renato Zero, Lucio Dalla, Mango, Amii Stewart, Ornella Vanoni, Loredana Bertè, Eduardo De Crescenzo, Mietta, Gigi DAlessio among others. In 2005 her song Its Forever, sung in a duet with Dionne Warwick, was chosen as the official song of the 