She was born to Beata Krupinska Sulewski and Czeslaw Sulewski. She has two brothers named Kevin and Marcin. Her family is from Poland. (ref 1)
- Finneas wrote the song Claudia about her.
- Most award shows that Finneas attends, Claudia goes with.
- Because her family is from Poland, she is bilingual, being fluent in English and Polish.
- Her YouTube account used to be called BeyondBeautyStar.
- She became TeenVogue's first YouTube host in April 2015. (ref 3)
- Before dating Finneas she dated Jonah Green and Steffan Argus. (ref 3)
- She is 5' 8". 
- Her birthdate makes her the star sign of Pisces.
- During Finneas's 10 Things FINNEAS Can't Live Without | GQ interveiw with GQ, he brought Claudia out as his tenth item.
- Claudia has a pitbull named Peaches.
- Claudia has done her own collab with the phone case company "Wildflower"
- People have stated that she looks a lot like Finneas’s younger sister, Billie Eilish.
- She portrayed the role of Nicki in the TV Series 'T@gged' 
- She portrayed the role of Skylar in the TV series 'Versus' 
- She portrayed the role of Emma in the TV Series 'The Commute' 
- She portrayed the role of Phoebe in the TV Series 'Hyperlinked' 
- She portrayed the role of Katie in the TV Series 'Embeds' 
- She portrayed the role of Scrooge in the movie 'A Christmas Carol + Zombies' 
- She portrayed the role of Julie on the TV Series 'Runaways'
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