Brad Orth didn't want to celebrate his birthday (it's next week), so his co-workers with the city of Salem decided they'd sneak it up on him early today.

Brad even got a birthday treat with a candle and the group sang happy birthday," says the source. "He was in the best mood," the source adds. "He sat next to Ines. They were very cute and flirty.

Brad Pitt is celebrating another year of life with good company. Before turning 59 on Dec. 18, the Babylon star enjoyed a pre-birthday dinner with Ines de Ramon. In pictures obtained by E!