Rihanna: 'X Factor' Guest Judge!
Rihanna steps out in a grey sweater on Sunday night (September 11) in New York City.
The 23-year-old singer turned to Twitter to honor those affected by the 9/11 tragedies.
PHOTOS: Check out the latest pics of Rihanna
“Today marks 10 years since 1 of the most devastating events the world has ever seen!Lets remember those we lost and pray for their loved 1′s,” Ri tweeted.
On a lighter note, Ri will serve as a guest judge on The X Factor, TMZ reports. A source told the site that Ri and Simon Cowell enjoyed working on the show’s UK finale last year!