ROOM FOR TWO JUSTINS IN POP MUSIC?

Timberlake rose to fame as one-fifth of 1990's boy band N'Sync, becoming a pin-up for his good looks. He dated fellow singer Britney Spears.

After N'Sync parted ways in 2002, Timberlake launched his solo career with a new look and edgier sound in his debut solo album "Justified," with songs like "Cry Me A River" and "Rock Your Body," becoming chart hits. The album won a Grammy award.

His "FutureSex/LoveSounds" album arrived at the forefront of a new sound in the pop charts, fusing pop, R&B, hip hop and dance.

"'FutureSex' is what people are holding onto because it had that really futuristic sound from Timbaland," Anitai said.

Timberlake took a musical hiatus the last five years to focus on his acting career. He appeared in 2010 Facebook film "The Social Network," 2011's "Friends with Benefits" and last year's "The Trouble With The Curve," alongside Clint Eastwood.

During Timberlake's time away from music, a new Justin blazed a trail onto the pop charts, Canadian teenage pop phenomenon Justin Bieber, who has drawn comparisons to Timberlake for his inclusion of hip hop and R&B in his music.

Bieber, who has more than 32 million Twitter followers, tweeted a tip of the hat to Timberlake after the "SexyBack" singer posted his teaser on Thursday, saying "i have heard some stuff. u got a good reason to be ready. #greatmusic."

"There is room for two Justins, but Justin Timberlake is the original Justin and I think there's always going to be room for him," Anitai said.