Adam Lambert: 'OMG Officially 31'!

Adam Lambert is all smiles as he exits the Riva Bella Ristorante with a female friend on Monday (January 28) in West Hollywood, Calif.

The singer celebrates his 31st birthday today (January 29) – Happy Birthday Adam!

“OMG officially 31!,” Adam wrote on his Twitter account.

Adam is donating his special day to the We Are Family Foundation. He is encouraging fans to donate $31 to the foundation, a non-profit that promotes cultural diversity around the globe.

10+ pictures inside of Adam Lambert with a friend at the Riva Bella Ristorante…