If you thought Hilary Duff was so yesterday, think again! The former Disney star is back with her new single, "Chasing the Sun." Click here to listen!

Duff promoted her latest track with an airplane message, which she shared with Twitter followers.

"I swear the #chasingthesun plane is in the sky lol squint and look really hard," she captioned a bikini-clad snap.

The blonde starlet co-parents son Luca with Mike Comrie, who she hinted at reconciling with in May.

"I don't think Mike would ever go anywhere," Duff told Us Weekly at the ASPCA Cocktail Party. "I mean, we are really dedicated to taking care of Luca, and we're really good friends who spend a lot of time together."

"We're not in a rush for anything," she added. "So we're just trying to enjoy our lives and figure out what makes us happy and it's working for us."

She announced her split from Comrie in January, but fans have been speculating their relationship status since they were seen on vacation together.

Duff and Comrie were also seen enjoying Coachella alongside each other.

"We have Luca as our main priority," Duff explained. "But we do care a lot about each other. We're adults and we're making our way through life. Sometimes you do that together and apart and we're gonna be and we're going to do it in the most peaceful way possible."

It was rumored she turned to Scientology to cope with relationship woes after partying with Alana Masterson.

"When I was younger, we were very much churchgoers. Now that things have gotten a little bit busier and I have gotten a little bit older, I don't necessarily think that you have to go to church to be a believer. I travel so much and I work so hard, but I have faith in that kind of thing and I pray all the time and I believe in God," Duff explained on searching for spiritual connection.

What do you think of the new single? Sound off in the comments section below!