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Adele to release fourth studio album soon?

Adele is playing coy, but every subtle move is mounting an obvious case that something is going on.

On Monday, the 15-time Grammy winner quietly updating her Instagram and Twitter:

This comes after mysterious "30" billboards popped up last Friday:

There has been plenty more abstract fuel to theorize with over the last week. When Taylor Swift bumped her release of Red (Taylor's Version) up one week to Nov. 12, fans speculated that her decision was based on not wanting to overlap with an Adele drop. 

Then Billboard randomly tweeted about Adele's chart history:

The 33-year-old icon last released 25 in November 2015, which housed "Hello," "Send My Love (To Your New Lover)" and "When We Were Young."

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