Both of these ladies were born in Atlantic City, NJ which obviously explains a lot. Their father is a musician and was the Director of Entertainment at the Golden Nugget Hotel and Casino. They grew up around serious talent, even kicking it with the Rat Pack at early ages.
They moved to California before they were in New Jersey long enough to develop accents and became best friends early on. As kids, they made up many dance routines to Ace of Base's "The Sign" album and religiously listened to TLC's "Crazy Sexy Cool", even dressing like the group one year for Halloween. Between their mother and father, sharing a nearly 20-year age difference, they were exposed to a broad range of musical tastes.
In their adulthood, Laura moved to San Francisco and Ava to Orange County, and the sisters realized they weren't capable of being away from another. After Ava finished college, she promptly moved up the city so she and her sister could once again kill it on the regular. Thank God.