in my book i found the entry "the stupidiest...." this sound very unusual to me..... I would have said "the most stupid.. Are they both correct- like the unfriendliest and the most unfriendly

First notebook entry: Introducing myself So, Hi everybody. I'm Esther I live in Switzerland, in the German speaking part of it. I like to meet people and to talk to them. I easily get in contact with other people. I love this. But of course I also love languages. My two strongest ones are probably German and English followed by French and Italian. At the moment I'm studying Espanol. My next entry therefore will be in Spanish hoping that I'll get a lot of feedback.