(L-R: Sean Kingston, Iyaz)

There are probably millions of demo songs on MySpace. Somehow, one of Keidran Jones', aka Iyaz, got into Sean Kingston's ear and the rest is history in the making.

Kingston introduced Iyaz to his his producer and label-boss, J.R. Rotem and Rotem, in turn, introduced the Virgin Islands native Iyaz to the world with the surprise summer hit Replay. A dreamy R&B jam, "Replay" blends Iyaz' Caribbean flow with na na nas reminiscent of Akon's signature call.

The winning combination may have never happened. It took Kingston sending upwards of five messages to Iyaz on MySpace before the budding singer finally responded. Iyaz' excuse for not replying? He didn't believe the real Kingston would be spamming his MySpace inbox. After meeting up in Florida to talk shop – and party – Iyaz signed with Rotem and Kingston.

Despite his overnight success, Iyaz says he's got a lot of work to do: "I still consider myself an up-and-coming artist." What's the difference? Now he's got someone in his corner: "Sean is my 'little' big brother."

See: myspace.com/iyaz

Jason DeRulo owes his R&B fame to a freaky indie singer with a special name: Imogen Heap. The 20-year-old DeRulo has become an overnight star with Watcha Say, a slow jam that leans heavily on a hook sampled from Imogen Heap's underground hit, Hide and Seek, which was also featured in The OC and SNL. Produced by J.R. Rotem, the man behind Sean Kingston, "Watcha Say" has helped the Florida native DeRulo climb the iTunes top 10.

DeRulo first made heads turn in 2006, when he won the Showtime at the Apollo grand championship at the tender age of sixteen. Rotem quickly pounced on the young singer, dancer and actor, signing DeRulo to his Beluga Heights label. "There’s no limit to what he can accomplish. I think he raises the bar for all new artists," gushes Rotem. After getting gigs doing background vocals for Lil Wayne, Pitbull and Danity Kane, DeRulo says acting has taken a back seat to singing: "I was actually offered a role on Broadway, but I had to turn it down because my music was primary focus."

A slick dancer and promising actor, DeRulo could end up filling another role: that of embattled R&B singer and dancer Chris Brown.

See: myspace.com/JasonDerulo