Things appear to be heating up between Kylie Jenner and rapper PartyNextDoor.

After the two were spotted together last Wednesday night in Los Angeles when they went to Russell Simmons' All Def Comedy Live, 18-year-old Kylie and the 22-year-old up-and-coming Canadian rapper were again snapped on Saturday, this time out in West Hollywood, California. Kylie smiled and appeared relaxed as she chatted with fans, while PartyNextDoor looked at his phone and covered up in a blue hat and sunglasses.

The two went to a sushi restaurant and were there for about a half hour, an eyewitness tells ET of their casual outing, also noting that there was no PDA between Kylie and her rumored new man.

"Kylie was in a great mood and was very sweet with her fans," the eyewitness says.

WATCH: Kylie Jenner Sparks Romance Rumors With Rapper PartyNextDoor, Tyga Throws Shade

Kylie, who split from rapper Tyga earlier this month, is also all about flaunting her pricey ride at the moment. On Sunday, the reality star shared a close-up of her Ferrari, and described the eye-catching color as "Kylie Blue."

The newly single star later posted another pic and a video of her Ferrari on Snapchat.

It is unclear if Kylie got a brand new Ferrari, or if she got a paint job on the one that she was gifted with last year from Tyga for her 18th birthday, which she's been known to do before.

As for the 26-year-old "Rack City" rapper, he appears to be focusing on himself since the split.

"Single. Focused. Blessed. Living Life," Tyga tweeted on Sunday.

WATCH: Kylie Jenner Moving Out of $2.7 Million Home and Into $6 Million Mansion After Tyga Breakup

Still, that doesn't mean the rapper hasn't also been enjoying some new company. Tyga was spotted with aspiring lingerie model Demi Rose in Cannes, France, last week during the Cannes Film Festival, sparking his own new romance rumors.

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