Madonna Instagramed a photo of herself enjoying a bubble bath on Mother's day. The 55-year-old singer shared a picture of herself on her Instagram on Sunday, captioning it, 'The perfect end to a perfect day. #livingforlove.' She also went to her Instagram for hints about her new album, which she will be working on with Diplo, Avicii and Natalia Kills.

Madonna posted a throwback photo of son Rocco on her Instagram, as well as two photographs of her daughter Mercy and son David, playing on the grass with their dog Olga, on Sunday. 'Olga says HAPPY-MOTHERS DAY too! #livingforlove,' she captioned one of the photos of Mercy and David.

As for Instagrams about her new album, Madonna posted a photo with the caption, "Diplo is a slave driver! Got me working all hours of the night in the studio. Had to sneak into the bathroom! #clicclacclicclacbitchgetoffmyback."

Aside from "Bubble Butt" producer Diplo, Madonna has revealed that she has also hit the studio with DJ/producer Avicii and singer/songwriter Natalia Kills.

Madonna has also spent time with producers Cherry Cherry Boom Boom (Lady Gaga, Far East Movement) and S1 (Bey's "Best Thing I Never Had"). Hit songwriters Toby Gad (Fergie's "Big Girls Don't Cry," Beyonce's "If I Were a Boy") and MoZella (Miley Cyrus' "Wrecking Ball") are also doing work on Madonna's as-yet-untitled 13th studio album.

Madonna has been busy so far this year, aside from her new album. The Queen of Pop has been tied up promoting her #artforfreedom project and her new skin care line. Madonna released her MDNA Skin line in Japan last month at a popup store at Tokyo's Ba-Tsu gallery.

MDNA Skin includes a skin rejuvenator, a chrome clay mask and a serum that all promise "firm, resilient and radiant skin overflowing with energy." The line is not yet available in the U.S.