It's time for Singaporean singer Stefanie Sun to return to the music scene after a four-year hiatus with her new album entitled "It's Time", the singer says.

Sun was in Beijing on Tuesday, March 1, 2011 to promote her new album, Sohu.com reported. She appeared to have left her tomboy image behind, sporting a longer hairstyle and flattering full-length dress during her public appearance.

Attendees of the high-profile public event included Sun's parents and her music teachers-famous music pioneers Peter Lee Shih Shiong and Paul Lee Wei Song.

Sun's new album chronicles the changes in the singer's emotions during different periods of her life in a very clear timeline.

"I've become more mature in the past four years," Sun said.

"People cannot always stay young. One needn't surpass or change something deliberately."

While Sun acknowledged that album sales in general had declined over the last few years, she said music was still important.

"I wanted to make a good album now, and it's time to come back," Sun said.

The singer joined a new record label, Wonderful Music, this year. She entered the music industry in 2000 with a self-titled album "Yan Zi". Since then, she has recorded 10 albums and sold more than 10 million CDs.