Always (2007) marked a change of Big Bang's musical styles from their previous efforts, with the group experimenting with electronic dance music and setting it as the new music trend in Korea. It was also the first release in Korean's music industry to be promoted as a "mini-album".
The lead single "Lies" (Korean: 거짓말; Revised Romanization: Geojitmal), composed by G-Dragon, was a no.1 hit, topping Cyworld charts for two months in a row, eventually becoming their break-out hit and Song of the Year in the 2007 Mnet Asian Music Awards. "Lies" was named the "Song of the Decade" by Mnet's M! Countdown. On 2016, it was labeled the "Top Male Idol Song in The Best 20 Years" by music experts. The song was revealed to be the second most downloaded in the past nine years in South Korea.
Billboard stated that "Lies" placed Big Bang "down the path into the realm of avant-garde experimentalism that they’ve become known for over the past few years" and called one of South Korea's "most memorable songs." The impact of the song was described by Kang Myung Suk - a music critic and former editor-in-chief of 10Asia magazine. Suk wrote "in that time, the one song ‘Lies’ satisfied all the music consumers in Korea. The ‘sound’ of this song was better than the normal kpop, and the melody development was easy for anyone to enjoy. Before ‘Lies’ came out, the music charts were dominated by medium tempo ballad songs." The composition was also praised, noting that "G-Dragon made this song with memorable rap and melody pieces" and admired the song for having "no useless parts". The critic concluded "‘Lies’ has the generation’s code who wants to be a step forward in the trend but comfortable at the same time, and that wants to stand out but also somewhat mix in at the same time. This was a market that not exist before Bigbang’s ‘Lies, and this was the moment where the idols met this generation’s emotions."