Kanye has taken a sabbatical from public events
in the wake of his and Kim's traumatic past year
, which included his wife being robbed at gunpoint in Paris, as well as his hospitalization shortly thereafter. So it's no surprise that this birthday was decidedly more low-key. It's a stark contrast to past birthday's Kim has thrown the rapper, such as his 38th, where Kim rented out Staples Center
in Los Angeles, organizing a star-studded pickup basketball game that included John Legend, Justin Bieber, and several NBA stars -- from James Harden, to Kobe Bryant, to Magic Johnson and more.