Jessica Simpson Looks Super Skinny and Brunette in New Photo

We’ve said it before and we’ll say it again: Jessica Simpson is looking hotter than ever lately.

However, after the mother-of-two shared a new, sultry photo on her Instagram account on Tuesday, many people are worried that her weight loss has gotten a bit out of out control.

Come On Baby, Light My Fire …

A photo posted by Jessica Simpson (@jessicasimpson) on

Simpson posted this photo during a date night with her hubby Eric Johnson, wearing a sexy LBD and showing off her toned arms and shoulders. But while some people are focused on whether or not she looks too thin, we can’t help but notice an even bigger change: her hair!

The 34-year-old looks like she may have dyed her bleached blonde hair and gone for a darker hue. If this is, in fact, the case, it wouldn’t be the first time she’s changed her tresses. She went brunette for a bit of time in 2007, too!

However, just over the Valentine’s Day weekend, the singer and fashion mogul was still rocking blonde locks, posting a myriad of “Fifty Shades of Johnson” photos, emulating sexy moments from Fifty Shades of Grey.