The singer wears a variety of outfits and is backed by dancers in the teaser clip, which has surfaced on YouTube.
The track serves as the second single from her retrospective LP Dance Again...The Hits, which is out now and includes singles from her 13-year music career.
Lopez - who turns 43 today - recently confirmed that the full video would premiere on MTV at 7.50pm ET on Wednesday, July 25.
The video will air alongside a 30-minute interview with the star, where she will talk about her greatest hits collection and her departure from American Idol.
> Read Digital Spy's review of Dance Again...The Hits
Watch the 'Goin' In' preview below: