In what year was the album “What’s TWICE?” released by TWICE?

In what year was the album “What’s TWICE?” released by TWICE?: The album “What’s TWICE?” was released in 2017 by TWICE, featuring 4 tracks.
What is the most successful song from the album “What’s TWICE?” by TWICE?: “TT” is the biggest hit from the album “What’s TWICE?” by TWICE.
What are the main songs from the album “What’s TWICE?” by TWICE?: The main songs from the album “What’s TWICE?” by TWICE are “TT”, “CHEER UP”, and “OOH-AHH하게 Like OOH-AHH”.

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