Ok magazine reports, The One Direction star teased fans with a 20 second clip of new song Back To You.
The video, shared on Instagram to his 13million followers, shows him packing a jumper in to a suitcase.
A calendar with the number 21 can be seen in the background with Louis revealing the track comes out on July 21.
Grainy footage of Louis playing darts and checking his phone are also in the clip.
But it’s the micro-second of footage of a hand picking up a cup of coffee that has really got fans talking.
They believe that the hand belong to Louis’ bandmate Harry Styles due to the heavy rings, and lack of Louis’ distinctive 28 tattoo on his fingers.
"Yoooo why is that H's hand with the cup of tea?" one fan wrote.
"Okay but that's legit Harry's ring on that hand that picked up that cup," another commented.
A third added: "Whose rings are they when they put their hand near the teacup, you can't see the 28 but.. rings?"
Other fans noticed the fact Louis had paid a sweet tribute to the top-selling band by displaying One Direction’s gold record for Midnight Memories in the background.