SISTAR Heads Out on One Last Summer Adventure in 'I Swear' Video — billboard.com

Summer may be winding down, but that doesn't mean the SISTAR girls are slowing down on the feel-good tunes. About a month after releasing their sexy, sax-y "Touch My Body" single the act dropped a last-minute summer anthem "I Swear." The track opens with a straight-up R&B style as Hyolyn leads the girls in an a cappella harmony section. Quickly, piano and peppy trumpets pop into the mix to give the track a similarly uplifting feel akin to 2012's "Loving U." This new single has all the markings of a classic SISTAR track: smooth blending between the members' voices, a perky rap section from Bora and the breath coos impressive high notes from Hyolyn.

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