(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

"I gotta feeling… that tonight is gonna be a good night."

Artist: Black Eyed Peas

Song: I Gotta Feeling
Album: The End
Produced by: DJ David Guetta

Hype music for getting ready to go out, the songs starts as a straightforward rock number until massive kick drums come in.

OR

"Somebody call 911, shawty fire burning on the dancefloor, wooo ohhh."

Artist: Sean Kingston
Song: Fire Burning
Album: Tomorrow
Produced by: RedOne

Reminiscent of Italian DJ Benny Benassi's greatest hits, this club jam was produced by the man who helped Lady Gaga become this year's biggest pop star.

All eyes are on Houston's Baby Bash despite his claim that he's "never been the type of guy to put anything on the map." The rapper-singer recently became the "number one Latin Artist" on MySpace on the strength of the Lil Jon-produced Cyclone, featuring T-Pain. The strip club anthem has also cracked the iTunes Top 10 and is rising steadily on the Billboard charts. Now, after more than seven years in the game, the 32-year-old from Vallejo, California is on the verge of becoming a household name.

Born Ronnie Ray Bryant to a Mexican mother and Italian father, Baby Bash endured a difficult childhood – both of his parents were addicted to heroin. Inspired by Bay Area heroes E-40, Mac Dre and West Coast legend Ice Cube, the self-described "Latin lover" began performing on the California lowrider car show circuit. He eventually caught the eye of Latin rap pioneer Kid Frost, who recommended Baby Bash – then called Baby Beesh – to Houston rapper South Park Mexican. The pair collaborated on Wiggy, a menacing gangsta track from SPM's 3rd Wish to Rock the World.

After his debut, Savage Dreams, on Dope House records, Baby Bash relocated his hustle to H-Town. It was the right move. His 2003 major label debut, The Smokin Nephew, and its follow-up, Super Saucy, each unleashed bona fide hits: Suga Suga, a silky smooth R&B joint with Frankie J, and Baby, I'm Back, a romantic jam featuring an up-and-coming singer named Akon.

A successful songwriter, Baby Bash has penned hit songs for Paula DeAnda (Doing Too Much) and Frankie J (Obsession). Now signed to J Records, his third album, Cyclone, is a star-studded affair featuring Paula DeAnda, Pimp C of UGK, Sean Kingston, Keith Sweat, Marcos Hernández, Jean and Aundrea of Danity Kane. With production by J.R. Rotem (The man behind this summer's monster hit, "Beautiful Girls" by Sean Kingston), Timbaland protégé Ryan Tedder, Happy Perez and Feli Fell, Baby Bash may be releasing the sleeper hit of the winter.