The 28-year-old turned heads in her spoof designer tee while out in Los Angeles on Tuesday (6 August).
A play on designer, Celine's logo, Ashley's little number read 'Celfie' - clever eh!
The High School Musical star teamed her cool tee with boyfriend jeans and studded flats, completing her look with quirky red sunglasses.
Ashley kept her look low key with her hair pulled back into a messy bun, and a khaki shirt tied around her waist.
Slogan tees are a huge cult trend and their simplicity has gained them a huge following.
We're a little bit obsessed with them at the mo...
Ok, 'a little' is an understatement, we're a lot obsessed with them.
So, we checked out Stephanie Talbot's new book, Slogan T-Shirts Cult & Culture, for an extra fix on our fave new wardrobe staple.
The book touches on the history and the design processes of slogan tees as well as the inspiration for them and is £17.99 from Bloomsbury.com.
Perfect for all you fashionistas that love a bit of background on your bargains.
Check out next week's Reveal, out on 13 August, for a whole feature on slogan tees, including the one above, that's just like Ashley's, for only £10 from teeisland.co.uk.
You can thank us later!
What do you think of the slogan tee trend? Tell us in the comments below as the best comment from across the site each week!