Brown announced his proposal to his girlfriend Kelsey Riley on Saturday -- with the help of none other than John Legend. The elegant proposal featured the award-winning musician Legend serenading the couple as he played a piano. "Congratulations to you both," Legend wrote in the comments of Brown and Riley's joint post. Another post by Brown from the proposal expressed his appreciation for a number of important people in his life. A number of Brown's Eagles teammates were featured in the photo, including DeVonta Smith, Jahan Dotson and Nakobe Dean.