A struggle ... Madonna and eldest child Lourdes.
Madonna has opened up about life as a single mother, insisting she often "struggles" to raise four children on her own.
The pop superstar has a 15-year-old daughter, Lourdes, from her relationship with Carlos Leon, and a son Rocco, 12, from her marriage to Guy Ritchie, as well as David, six, and Mercy, five, who were both adopted from Malawi.
Madonna admits life as a single parent is "hard" and she sometimes feels as if her "head is going to explode" from the stress of juggling work with her family duties.
"I'm not going to lie - it's hard work having four kids and doing all the work I do. Sometimes I cope with it very well, sometimes it's a struggle," she told Britain's The Sun on Sunday.
Madonna has even written a new song about her struggle, called I Don't Give A..., in which she raps about "the life of an ex-wife", "custody" and "pre-nups", apparently in reference to her failed marriage to Ritchie.
"It's about the life of a single mother. It's a challenge juggling everything - multi-tasking is my middle name. I try to express that," she added.