She has taken time off work to spend time with her family, but there are now rumours of a $43million year-long Las Vegas residency.
And the family have been making use of their fortune, buying a $12.7million mansion in Beverly Hills, boasting six bathrooms and a swimming pool.
She has also amassed an impressive property portfolio in Britain, including two homes in Kensington, West London, worth $21million, and a $4.9million seaside pad in Hove, East Sussex.
Second in Heat magazine's annual guide to Britain's wealthiest 30 people aged 30 and under is Ed Sheeran, whose fortune increased by $82million.
The songwriter, 27, is estimated to be worth $184.2million, up from $101.9million, thanks to bumper sales of his third album Divide, with more than six million copies sold. His two-year world tour brought in ticket sales of $441million.
Sheeran knocked Harry Potter star Daniel Radcliffe into third place.