I have listened to ABBA since I bought my first ABBA album back in 1977. I have every album. I also have ABBA 8 track tapes a cassettes. I have an ABBA T shift from 1978, and multiple ABBA videos, including "ABBA, The Movie". Great harmony!!! There will never be another group like ABBA. I think my favorite song is "Knowing Me Knowing You".