BUT OF COURSE: Beyoncé, Jay Z to attend Obama birthday bash.

Obama is celebrating his 55th birthday Thursday with a star-studded celebration at the White House, with Beyoncé and Jay Z attending. Kendrick Lamar, the president’s favorite rapper, will also show up, according to the New York Post.

R&B star Usher will perform for the first couple and their guests.

It’s Obama’s last birthday as president, and he is planning to go out in style.

Several stars from the worlds of entertainment, sports and music have scored an invite. The guests include comedian Ellen DeGeneres, singer Stevie Wonder, Vogue editor Anna Wintour, singer and actress Jennifer Hudson and basketball legends Magic Johnson and Alonzo Mourning.

The Obamas have been known to throw private parties with A-list guests.

Last summer, Prince performed for a group of 500 people at the White House.

The party is taking place one day before the Obama family leaves for its annual vacation on Martha’s Vineyard, Mass.

Solidarity with the workers!