Michelle Obama Turns 50

WASHINGTON (AP) - Michelle Obama is celebrating her 50th birthday today.

The first lady is spending the day out of sight, with no public appearances after back-to-back White House events this week. But she tweeted a picture of herself holding up her AARP card.

She tweeted that she's "Excited to join Barack in the 50-plus club today."

The president turned 50 in 2011.

A birthday bash is on tap for tomorrow night at the White House.

The president has been involved in the planning.