U.S. President Barack Obama's wife will reach the milestone on 17 January (14) and preparations are already underway for a major party in Washington, D.C.
The star-studded bash will include a number of musical performances from high-profile artists, and Britain's Mail on Sunday newspaper reports Adele and Beyonce have both been invited to sing.
A source tells the publication, "America's First Lady will be holding a huge celebrity-packed party for her birthday at the White House next year and, as she adores Adele and Beyonce, she has asked them both to sing. Adele has graciously accepted and waived her usual fee for the high-profile private performance. She will sing a selection of her most-loved hits for the First Lady and her friends."