Alicia Keys is off the market. She's been off the market for at least a year, but now the star is REALLY off the market. UsMagazine.com is reporting Alicia got engaged to producer/rapper Swizz Beatz over the weekend. The site's got a ring pic to prove it. No word from R&B singer Mashonda, the influential producer's outspoken ex. Still, we think "No One" can get in the way of how Alicia feels about her man...