R+B superstar Rihanna has dismissed reports accusing fellow singer Beyonce Knowles of breaking her toe in a jealous fight - insisting the rumours are "crazy". The SOS hitmaker denies a bitter rivalry between herself and the former Destiny's Child star was sparked by her collaboration with Knowles' hip-hop mogul boyfriend Jay-Z on hit single Umbrella. The 19-year-old told British magazine Star, "That's crazy. Not at all (is it true). "It (breaking her toe) happened on vacation. I'd just got there and couldn't sleep, so I wanted my best friend to go in the pool with me. "I ran into her room and straight into a solid mahogany chair. It hurt so much - my toe was pointing to the side."