Megan Hauserman, who competed on 2008's Rock of Love with Bret Michaels, was arrested in Miami, Florida last year.
She recently struck a plea deal with prosecutors that will keep her out of jail, on the condition that she pleaded guilty to the count.
As part of her punishment, the blonde star has been banned from driving for six months, ordered to complete a drink-driving awareness course and told to complete 100 hours of community service, according to TMZ.com.
Hauserman last hit the headlines in February, when she settled a legal battle with Sharon Osbourne following an altercation on another reality show, Rock of Love: Charm School, in December 2008. Hauserman sued the rock matriarch for battery and negligence after an alleged attack, but reached a confidential agreement a day before the case was due to go to trial.