Question: What song by Barbadian singer Rihanna, spent ten weeks at number one in 2007 in British music charts?
Sentence (from "2007 in British music charts"): Rihanna spent ten weeks at number one with "Umbrella", the longest stay for any artist at number 1 for thirteen years and the second best selling single of the year, and Amy Winehouse had the biggest selling album of the year with "Back to Black".
Relevant evidence: Yes