Adele is hoping she's pregnant by the time she reaches 30 next May.
The 'Hello' hitmaker - who already has four-year-old son Angelo with her husband Simon Konecki - has asked her friends to plan a less extravagant and more intimate affair when her milestone rolls around on May 5 as she's hoping she'll be with child.
An insider is quoted by the Daily Star newspaper as saying: "She made it clear to friends that she really wants a sibling for Angelo. The big day will be less about a blow-out event but some smaller celebrations with friends and family."
The 29-year-old singer has made no secret of the fact she wants to expand her brood with her partner, whom she married last year in a secret ceremony, as she admitted during her 'Adele Live' tour in March that she is planning to take an extended break once she'd finished on the road so that she can focus on having another baby.
She said at the time: "I'll see ya later, I'll see ya on the other side. In a couple of years when I'll be back, you won't be able to get rid of me. I'm going to go and have a baby."
And it looks like the blonde beauty is keen to raise her family in her native England - despite having a lavish property in the US - as she wants to be around her friends.
A source said: "Adele feels Los Angeles is not quite the place she thought it was. Back here [in London], she has her family and close friends who are so important to her."
However, friends previously said she was tied between the two countries as she is able to live an undisturbed life across the pond and she thinks the schools are better there.
An insider explained: "Now some time has passed, she realises how great California is - given the schools, lifestyle and weather, and how she's not disturbed as much as she is in the UK."