With this album ABBA started their conquest of the world, they reached the number 1 in Australia, UK, Mxico, Belgium, Germany and other countries thanks to hits like Mamma Mia, SOS and I do, Ido, I do, I do, I do. Includes bonus tracks.- Mamma Mia- Hey, Hey Helen- Tropical Loveland- SOS- Man in the Middle- Bang-A-Boomerang- I Do, I Do, I Do, I Do, I Do- Rock Me- Intermezzo No. 1 (Instrumental)- I've Been Waiting for You- So LongBonus tracks:- Crazy World" (Andersson, Ulvaeus) B-side of "Money, Money, Money"(1976)- Medley: Pick a Bale of Cotton/On Top of Old Smokey/Midnight Special (Trad. Arr. Andersson, Ulvaeus). B-side to the "Summer Night City" (1978)- Mamma Mia" (Spanish version by Buddy McCluskey, Mary McCluskey) - Baby (early demo version of "Rock Me" recorded in 1974)- Here Comes Rubie Jamie (working title of a song recorded in 1974)(P)1975 Polar Music international AB, Stockholm, Sweden.Stig Anderson helped with the lyrics on "Mamma Mia", "Tropical Loveland", "SOS", "Bang-A-Boomerang", "I Do, I Do, I Do, I Do, I Do" and "I've Been Waiting for You"