Booble, which based the contest on its popular Booble fan-sign program, in which adult models place their boobs between the "B" and "ble," said it is "pleased" to have Benz's "awesome ‘OOs'" in its sign.
Benz, who made headlines with her brand-new pair of boobs, beat out the likes of Carmen Luvana, Catalina Cruz and Dawn Allison to win the recognition.
"I'm so excited about being Booble's May Cover Girl," she said. "It's an honor, and I want to thank all my fans for voting."
As a Cover Girl of the Month, Benz is in the running to be Booble Girl of the Year, which comes with a $5,000 prize. The other monthly winners competing for the annual award are Shyla Stylez, Sophie Dee, Vicky Vette, Sabrina Deep, Mariah Milano, Trina Michaels, Brandy Talore, Tera Patrick and Heidi Mayne.
Benz is one of the top superstars of the adult industry and has crossed over into the world of mainstream entertainment, having appeared on MTV's "Fast Inc.," Showtime's "Family Business," VH1's "Supergroup," HBO's "Sin City Diaries," Canada's "Naked News," Playboy TV's "Canoga Park" and the world-famous "Howard Stern Show."
The Booble Girl contest is open to models who are at least 18 years old and have a website or cam show, appear on a website or cam site, or appear in at least one commercially released DVD. Models must use the fan sign provided by Booble.
Booble users select the monthly winners, who receive $500 and entry into the annual contest.