Having teased fans with two music video teasers in the past few days, girl group Stellar returns to the music scene with a fresh new song and style!

Although the group underwent member changes, the quadruplet is coming back stronger than ever with a catchy song which is sure to grab the attention of those unfamiliar with the group.

Be sure to check out the girls' second comeback stage for "UFO" below�and you can see the full �'Music Bank' performances�here!

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