ALICIA KEYS - USHER AND KEYS IN LOVE?

R+B superstars ALICIA KEYS and USHER have reportedly fallen in love while shooting the video for their upcoming chart duet.

The pair have united to record new track MY BOO - and sources claim a romance has blossomed.

According to American news website PAGESIX.COM the pair were inseparable while filming the single's promo at New York's Silvercup Studios last week (ends6AUG04).

A source tells the site, " They've been really close - at photo shoots, at rehearsals, all over town."

Heart-throb Usher has been single since splitting from TLC singer ROZONDA 'CHILLI' THOMAS in January (04).

Keys recently denied reports she has been dating her songwriting partner KERRY 'KRUCIAL' BROTHERS.