The 33-year-old singer, who celebrated Christmas with her writer-producer beau Charlie Ebersol and her children last week, splashed out on a dark brown steed for his recent 32nd birthday and also purchased a light brown pony for herself.
The 'Perfume' hitmaker shared photographs of them riding their new pets around a stable on Twitter.
"Birthday horses for my birthday boy," she tweeted.
She also presented him with a huge cake covered in romantic photographs of them together, in addition to images of other couples.