This is likely all coincidence, but I found it somewhat odd nonetheless:
Pensión Playa, one of the Hotels in Los Cristianos (where Jay and his group were staying) has a picture showing a blanket draped across one of the beds:
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This blanket bears a striking resemblance to the blanket being worn by the individual alleged to be Jay in the snapchat taken at the villa in Masca:
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Now, we don't know that this is the particular Hotel that LL was using, however a 'Lucy' left a review on the 16th of June that ties in pretty neatly with the group's stay. (Jay arrived on the 13th):
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Now, this is all circumstantial. There's nothing solid to indicate that the 'Lucy' who left the review is LL; there's a good chance that these blankets are sold all over the island, and are as ubiquitous as those awful 'Live, Laugh, Love' murals are in the UK - but it still seems like quite the coincidence that this blanket would appear twice in two completely different areas of the island whilst still connected to the same individual. I think it's safe to assume that Jay didn't take the blanket clubbing with him that evening. JMO.
Edit: Link to the Hotel on Booking.com -
Pensión Playa, Los Cristianos, Spain