Strictly Come Dancing head judge has said she is "sorry" to her co-star Anton Du Beke after pulling a sneaky trick earlier this week.
But a few months ago she revealed she was taking on a new career path and becoming an author. Shirley describes her debut novel Murder on the Dancefloor as "your backstage pass to a world of sex, lies, intrigue, backstabbing and murder".
She also said it features "a cast of fabulous characters". Anton, 57, also has a book out at the moment - romantic wartime saga The Paris Affair.
While Shirley appeared at a book signing at a Sainsbury's store on Wednesday she covered Anton's books with copies of her own instead before sharing a video of her doing so on Instagram. Captioning the comical post she simply said: "Sorry @mrantondubeke … it wasn’t me".
Fans were loving the clip as Michelle said: "Oh no, poor Anton, he’s my favourite. Made me laugh though" and Alison said: "Haha both books on my Xmas list so no worries here". Daanya said: "Oh Shirley this is actually hilarious".
Strictly Come Dancing continues on BBC One and BBC iPlayer
Receive newsletters with the biggest and breaking TV and showbiz news by signing up here