In today's Viral Video of the Day, a little boy named Jackson had an emotional surprise for his cousin Mason. TikTok could barely handle how sweet it was!

In the clip, Jackson's dad is shaving his head as the boy FaceTimes Mason – who has cancer – to show him the new look.

Mason is instantly stunned, blurting out, "You did not!" before breaking down in tears, causing Jackson to get emotional too.

Mason later made it clear that the tears were "happy tears," making the gesture even sweeter.

One viewer wrote, "I pray that Mason and Jackson have many more days and get to enjoy life together."

Check it out:

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