^I know of at least 2 covers of Sakura Drops. The first is by sister kaya, and I can't remember the second one, but it was by a girl who had a really treacly/etheral voice. I can't remember their name though.
The owner of the utada forums "hikaru.sc", k3-光, owned a website that actually had a list of every artist who ever covered an utada song, whether it be a concert song, tv performance, or studio version. they also had links to songs and videos of each. I wish I could find it.
Also is everyone forgetting (or not know) that Boys II Men covered First Love?