New Delhi: Actress Aishwarya Rai is a regular on the Cannes red carpet. But her visit to the 65th edition of the prestigious film festival is for a cause -- the former beauty queen will help raise funds for fight against AIDS at an auction there. The actress will be in Cannes May 24-25 and attend L'Oreal Paris - amfAR (The American Foundation for AIDS Research) dinner that will help...