Holly Madison shared a collage of her baby girl Rainbow to wish husband Pasquale Rotella a happy Father's Day. Credit: Courtesy Holly Madison

She's a daddy's girl, alright! Holly Madison celebrated Father's Day by taking to Instagram and posting a photo collage of her darling baby girl, Rainbow Aurora, sharing different moments with her dad and Madison's husband, Pasquale Rotella.

One photo shows Rainbow, 14 months, looking over the shoulder of her father, who has his back turned away from the camera. Another is a close-up of the tot sucking her thumb as she naps on Rotella, who also has his eyes closed. 

"Happy Father's Day to the best daddy ever - Love, Rainbow Bee," the happy mom captioned the picture, writing on her daughter's behalf. 

The headliner and hostess of 1923 Bourbon & Burlesque in Las Vegas, 34, welcomed her daughter on March 5 of last year with Rotella. She married the nightlife entrepreneur in September, holding the wedding at Disneyland, where Rainbow "was the surprise guest of honor."