People have been raving about Adele's comeback song, "Hello", but not everyone is happy about it. For instance, Tom Waits fans are sure that they've heard the song before. According to The Washington Post, they have claimed that the song that is now the fastest-selling digital record ever is a derivation of Wait's song from 1973, called "Martha".

However, it is not the melody that has the Waits fans rating on Adele. They were more concerned about the lyrics, which are both about reaching out to lost loves through the telephone.

That's not the only problem with "Hello", either. The first few bars of the song is also noted to be similar to Lionel Richie's "Hello", which, of course, prompted a cool mashup instead of a backlash.

Wait's fans may not have too much to hold over Adele, though, because truly, there are a lot of similar themes in music. However, Adele's co-writer, Gregory Allen Kurstin did admit toEntertainment Weekly that the song is indeed inspired by Wait's "Martha". "She didn't want to just go through and write a pop song with any particular formula. We talked about Tom Waits, and different storytellers like that," he shared.

He also told the outlet, "I think that was the idea, that we wanted to do something that was very honest about where she was at right now, and she wanted to do something that was real and believable."

While fans questioned for whom the song is written to, Adele told Rolling Stone that it is not the same person who inspired her 2011 album, "21". She said, "If I were still writing about him, that'd be terrible. 'Hello' is as much about regrouping with myself, reconnecting with myself."

Meanwhile, If Adele's partner in the music video looks familiar to you, it's because you probably saw him somewhere before: Yes, as Yibada confirmed, it's Tristan Wilds from the now defunct series, "90210".

The video broke two records -- it's the most-viewed video in 24 hours with 27.7 million hits. The said record was previously held by Taylor Swift for "Bad Blood". It is also the video that got 100 million views in the shortest time, a title previously held by Miley Cyrus for "Wrecking Ball."

There is definitely a lot to look forward to Adele's music. Her album is set to be released later this month and already, the multi-awarded Grammy winner is looking at a great comeback if her first single in three years is any indication.

As for Tom Waits' fans -- would their accusation hold over water for alleged "plagiarism"?