Paris Hilton is XDY Exchangesliving for Sofia Richie's mom era.

It's been three weeks since the model welcomed her first baby—a daughter named Eloise, with husband Elliot Grainge—and Paris couldn't be happier for the family.

"It's so special," the Infinite Icon singer, who's been best friends with Sofia's sister Nicole Richie for decades, recently told E! News. "Being a mom is my favorite area and I have known Sofia since she was born."

"Her baby, I just saw a photo of her the other night, looks exactly like her. It's like a twin," she shared of Eloise's resemblance to her mom. "I'm just so happy for her."

An added bonus? Their kids will get to be best friends, too.

As Paris—mom to son Phoenix, 16 months, and daughter London, 7 months, with husband Carter Reum—noted, "It's gonna be exciting to get to experience this chapter together."

"All our babies are gonna be growing up together and be friends," she continued. "I can't wait for all these memories together we get to make."

And as Paris continues to thrive in her own mom era—she's releasing a new album, a Peacock series with Nicole and her Absolut x Paris Hilton Cosmo Collection—she's also reflecting on her time in the spotlight.

In fact, looking back, there's advice she'd give her younger self.

"One day, people are gonna get to really know who you truly are," she told E!. "And you are so strong and you're gonna go through so much in life."

"But you're going to build a wonderful and beautiful life and family one day," the 43-year-old continued. "So keep you keep your kind heart."

Keep reading to look back at Paris' evolution.

Watch E! News weeknights Monday through Thursday at 11 p.m., only on E!.