She looks great!

On Saturday, Hilary Duff decided to don all black before and after her workout as the singer was all smiles after leaving a gym in Beverly Hills.

Besides her fitness, the 26-year-old entertainer has another reason to be happy as she's premiering her new single All About You on August 11. The song follows Duff's first single Chasing the Sun, which she debuted last month.

Duff, who recently shared the song's cover art via Twitter, will appear on the Adam Bomb radio show to give fans a first listen to the new track that's sure to be on her forthcoming fifth studio album, set to release this fall.

Can't wait to hear it!