"I knew Hello would be the first song that I came back with in any capacity. Just because of the opening line and stuff like that. At first, I was a bit like, 'Is this too obvious?' But, it's so conversational, and I wanted to have a conversation with everyone. After I heard it on the radio, it was such a relief. I went to the toilet and cried my eyes out." Adele had an emotional reaction to the first time she heard her comeback single on the radio.