Ashlee Simpson and Pete Wentz out and about in Hollywood. Los Angeles, California, USA - 04.10.08

The singer, who according to husband Pete Wentz is "very pregnant", will send out invites to close friends and family members early on Saturday in a bid to keep the party and the location a secret, according to reports.

Meanwhile, anxious Wentz says, "I'm on call permanent right now... It could happen any day now."

Source: WENN