Fifth Harmony's Camila Cabello has been pretty flirty with Shawn Mendes over Twitter lately, but things have escalated since the pair was seen at an after party together for the MTV Video Music Awards Sunday night following the big event.

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To further spread rumors that they are a couple, the pair hung out and had a mini jam session over cookies and water.

On Monday night, Mendes shared an Instagram video, which he captioned, "Say my name x give me love," of himself playing his guitar while he and Cabello did a mash-up of Destiny's Child's "Say My Name" and Ed Sheeran's "Give Me Love".

 Say my name x give me love @camila_cabello

A video posted by Shawn Mendes (@shawnmendes) on Aug 31, 2015 at 8:35pm PDT

   Watch Camila Cabello Perfectly Rap Busta Rhymes' Verse From 'Look At Me Now'   The pair sound really good and we're rather bummed it is such a short snippet! Mendes sang the "Say My Name" portion while Cabello tackled the lines from Sheeran's "Give Me Love". On Tuesday afternoon, Cabello shared the same Instagram video, but captioned it "give me my name?"

give me my name? @shawnmendes A video posted by camila_cabello (@camila_cabello) on Sep 1, 2015 at 11:23am PDT

It seems like these two love being goofy together, which is the perfect makings for a future of dating (if they aren't already) since it's always a plus when you're comfortable with a significant other.

Do you think Mendes should join Cabello's girl group for a collaboration in the future? What other songs do you think Mendes and Cabello should mash-up? Tell us in the comments!

Tags: shawn mendes fifth harmony camila cabello