Thirty-year-old Lucy Guo might be the world’s youngest female billionaire, but she’s always on the hunt for a good deal.

The California-based serial entrepreneur’s net worth soared to $1.3 billion in April, according to Forbes. Her first startup, Scale AI, recently wrapped up a deal with tech giant Meta, bringing the firm’s valuation to $25 billion.

Guo left Scale AI in 2018, but held on to a stake worth just under 5% which has now ballooned to $1.25 billion. Three years ago, she founded content creator monetization platform Passes, where she continues to work.

“Honestly, I still feel the same as that little girl, like my life pre-money and post-money, it hasn’t really changed that much,” Guo told CNBC Make It. “I still find deals like I pretty much only order buy-one-get-one-free on Uber Eats.”

Famously frugal Guo has shared stories online about skateboarding to work and even booking fake flights at the airport, only to cancel them later, so she could eat for free in the Amex lounge.