"[She's] a bit wild," the neighbor told the Daily Mail. "I know she has been back [home] a few times. They did have parties when the oldest daughter has had her children. When the recycle bin collection comes to their place it sounds like it's a club."

The most shocking detail of all, however, is her appearance. Mann is known for having blonde hair and dressing in ska-inspired outfits, which is very similar to Stefani's style, and it seems as though she's been copying her for years, according to Entertainment Tonight. In June 2014, Stefani was photographed in a green jumpsuit and a photo of Mann, rocking a platinum blonde ponytail, in what appears to be the same exact jumpsuit surfaced shortly after. She was even seen copying one of Stefani's bandana looks back in 2013.

The affair accusations all started when Stefani found disturbing text messages and several nude photos going on between Mann and Rossdale, and even before she confronted her ex-husband about what she found, Stefani realized there was something off about the nanny. They first hired Mann in 2008, and Stefani quickly started noticing these little similar details in their appearance and actions.

"If Gwen would eat something or do a workout or get a new handbag, Mindy would do the same thing," a source told Us Weekly. "Gwen thought it was weird...[She] began to post pictures on social media dressed in a similar way to Gwen."