Adele: I don't want to endorse nail polish, but thanks for asking
Adele has been asked to be the face of candles, fitness ranges and toys since she became famous.
The 27-year-old singer, who also denied that she is a "recluse", also said she would rather sing at a party for free than get paid a million pounds for the honour.
In an interview with The Observer Music magazine, Adele said: "What have I said no to? Everything you can imagine. Literally every-f***ing-thing. Books, clothes, food ranges, drink ranges, fitness ranges... That's probably the funniest.
"They wanted me to be the face of a car. Toys. Apps. Candles. It's, like, I don't want to endorse a line of nail varnishes, but thanks for asking. A million pounds to sing at your birthday party? I'd rather do it for free if I'm doing it, cheers."
The Hello singer said of fame: "It's very easy to give in to being famous. Because it's charming. It's powerful. It draws you in. Really, it's harder work resisting it. But after a while I just refused to accept a life that was not real."
She went on: "Like, becoming OK with having things done for you. Or - no - expecting things to be done for you. I've had a few moments like that. And it frightened me.
"I think it was something simple like running out of clean clothes. And me not having the initiative to wash my own clothes. I was annoyed that my clothes weren't clean."
But she added: "So I told myself I'd better abseil down. And go and do my f***ing laundry."
Adele has been referred to as a recluse, but she told the magazine: "I'm not a recluse. Can we clear that up? I didn't stop going to shops. To parks. To museums. I just wasn't photographed while doing it."
Talking about love, Adele, whose music has been inspired by an ex-boyfriend, said: "It sounds obvious, but I think you only learn to love again when you fall in love again.
"I'm in that place. My love is deep and true with my man, and that puts me in a position where I can finally reach out a hand to the ex. Let him know I'm over it."