Celebrity Wedding News: Jessica, Ashlee, Mariah, and even Lou Reed tie the knot!

Single people in Hollywood who are avoiding marriage: Watch out. There must be something in the water. In the last month, there have been more celebrity weddings than you can shake a stick at, including Jessica Alba's surprising celebrity wedding in the last 24 hours.

Here's a list of who's tied the knot recently, along with wedding details.

• Jessica Alba and Cash Warren Monday, May 19.
According to People, Jessica Alba and Cash Warren got married at the Beverly Hills courthouse, in a simple ceremony with no friends or family present. Alba wore a long blue dress and Warren wore a simple white shirt with brown pants.

• Sister, Sister star Tia Mowry and actor Cory Hardrict Sunday, May 18
Twin sistere Tamara served as maid of honor, as Tia wed in a dress designed by Kevan Hall.

• Ashlee Simpson and Pete Wentz Saturday, May 17
150 guests watched as Ashlee Simpson and Pete Wentz got married at Simpson's parents house in California. Ashlee wore a Monique Lhuillier dress, and the wedding had an "Alice in Wonderland" theme. Rumors say the rushed wedding was due to Ashlee's pregnancy, but the couple won't confirm or deny that.

• Mariah Carey and Nick Cannon April 30, 2008
In what's been described as an impulsive move, Mariah Carey and Nick Cannon got married at a house she owns in the Bahamas. Though they've been friends for a long time, supposedly they had only dated for a little over a month when they tied the knot.

• Jason Biggs and actress Jenny Mollen April 23, 2008
Another simple ceremony at the courthouse, with no friends or family present. • Musician Lou Reed and performance artist Laurie Anderson April 12, 2008 At a small, non-denominational ceremony in Boulder, Colorado, Lou Reed and his longtime love, Laurie Anderson tied the knot, with just two friends as witnesses.