Hats Optional

Actress Cybill Shepherd poses as she arrives at the Barnstable Brown Derby party in Louisville, Ky., on May 4, 2007. The 133rd running of the Kentucky Derby was held on Saturday.

Actor Jerry O'Connell poses as he arrives at the Barnstable Brown Derby party celebrating the 133rd Kentucky Derby in Louisville, Ky., on May 4, 2007.

Former Miss USA Tara Conner poses as she arrives at the Barnstable Brown Derby party in Louisville, Ky., on May 4, 2007.

Actress Gabrielle Union was among the celebrities to walk down the rose petal-lined red carpet of the 133rd Kentucky Derby at Churchill Downs in Louisville, Ky., on May 5, 2007.

Larry Birkhead waves as he arrives at the 133rd Kentucky Derby at Churchill Downs in Louisville, Ky., on May 5, 2007. Birkhead, the ex-boyfriend of Anna Nicole Smith, recently returned to his home state with their daughter, Dannielynn.

Musician Gene Simmons walks with his girlfriend, former Playboy Playmate of the Year Shannon Tweed, right, and her sister, Tracy Tweed, at the 133rd Kentucky Derby at Churchill Downs in Louisville, Ky., on May 5, 2007. Shannon Tweed told the AP she bets on a horse based on how the jockey's silks looked.

Another former Playboy Playmate of the Year, actress Jenny McCarthy, poses on the red carpet at the 133rd Kentucky Derby at Churchill Downs in Louisville, Ky., on May 5, 2007. McCarthy was a first-timer at the event.

Actress Melissa Joan Hart arrives at the 133rd running of the Kentucky Derby at Churchill Downs in Louisville, Ky., on May 5, 2007. Hart, who is best known for her TV series "Sabrina, The Teenage Witch," was hoping to see or meet the Derby's royal guest, Queen Elizabeth II.

Singer Nick Lachey, right, and girlfriend Vanessa Minnillo arrive for the 133rd Kentucky Derby at Churchill Downs in Louisville, Ky., on May 5, 2007.

Looking pretty in pink, former Miss USA Shandi Finnessey arrives for the 133rd Kentucky Derby at Churchill Downs in Louisville, Ky., on May 5, 2007. Most recently, Finnessey was a contestant on season four of "Dancing With The Stars."

Singer/actor Joey Fatone arrives with his "Dancing With The Stars" partner Kym Johnson at the 133rd running of the Kentucky Derby at Churchill Downs in Louisville, Ky., on May 5, 2007. Fatone is among the leaders in the latest season of celebrity dancers.

Emily Robinson of the Dixie Chicks poses in her Derby attire as she walks down the red carpet at Churchill Downs in Louisville, Ky., for the 133rd running of the Kentucky Derby on May 5, 2007.

Star Jones Reynolds arrives at the 133rd Kentucky Derby at Churchill Downs in Louisville, Ky., on May 5, 2007.

Singer Nick Lachey walks through the crowd at the 133rd Kentucky Derby at Churchill Downs in Louisville, Ky., on May 5, 2007.

Musician Kid Rock and Danish model May Andersen take a walk at the the 133rd Kentucky Derby at Churchill Downs in Louisville, Ky., on May 5, 2007.

O.J. Simpson gets a hug from jockey Angel Cordero Jr. at the 133rd Kentucky Derby at Churchill Downs in Louisville, Ky., on May 5, 2007.

Musician Gene Simmons greets Will He Shine in the Paddock area during the 133rd Kentucky Derby at Churchill Downs in Louisville, Ky., on May 5, 2007. The horse finished third in the Churchill Downs Stakes, one of nine races held before the main event.

Actress Gabrielle Union, left, and TV host Shaun Robinson hang out in the Jockey Suites at the 133rd running of the Kentucky Derby at Churchill Downs in Louisville, Ky., on May 5, 2007.

Former NBA stars Michael Jordan, left, and John Salley hang out in the Jockey Suites at the 133rd running of the Kentucky Derby at Churchill Downs in Louisville, Ky., on May 5, 2007.

Michael Jordan jokes with actress Gabrielle Union in the Jockey Suites at the 133rd running of the Kentucky Derby at Churchill Downs in Louisville, Ky., on May 5, 2007.