Fergie throws sister a bachelorette party

Mama-to-be Fergie recently had another happy occasion on the brain: Her sister’s upcoming wedding.

The songstress threw her sister Dana Ferguson a laid-back bachelorette party at the Viceroy Santa Monica over the weekend.

Fergie and the other ladies had a “special dinner in one of the hotel’s private rooms with floor-to-ceiling windows” on Friday night before hanging out at the pool all day Saturday in a private cabana, a witness dished to us.

As a parting gift, Fergie, who is expecting her first child with hubby Josh Duhamel, took home a bathrobe with “Mom” monogrammed on it, while her sister left with a robe with the word “Bride.” Cute!