The singer shared photographs of her experience via an Instagram post on Monday.
“Never too old to ride a unicorn… And thank god for friends that spend the day with you painting your pony!” — Lambert wrote alongside a collage of photographs which features her looking happy while riding Sophie, which sports a pink horn, reports aceshowbiz.com.
Lambert added the hashtags: “#32tomorrow #bday #unicornsarereal #sophie #gypsyvanner #glitter #reallifelisafrank.”
This is Lambert’s first birthday after splitting from ex-husband Blake Shelton.
The two announced their divorce last summer after four years of marriage. Since then, her ex has moved on and is currently dating his fellow coach on “The Voice”, Gwen Stefani.