Now known simply as the “Blue Shirt Guy Assumptions Dance”, the meme has become one of the most recognisable music-driven viral moments of the 2020s. Set to Assumptions by Sam Gellaitry, the clip spread rapidly across TikTok, X, Instagram Reels and YouTube Shorts, blending expressive dance, internet humour, and flawless musical timing into a globally shared moment.
A short performance video by Russian dancer Ruslan Aidaev unexpectedly evolved into a defining meme format — one that still resurfaces whenever the opening beat of Assumptions drops.
Origins of the Meme
@jermiiog Full Video!!! 😭🔥🔥 #fypage #tiktok #fyp #assumptions #blueshirtguy #assumptionsdance #fypシ #fypシ゚viral #meme #dance
“Assumptions” is a song by Sam Gellaitry, originally released in 2021 as part of his IV EP. While the track was already popular among electronic and dance fans, it experienced a major resurgence in 2025 thanks to its use in a viral video featuring Ruslan Aidaev, now universally referred to online as “Blue Shirt Guy.”
The original video shows Aidaev performing a fluid, highly expressive dance routine while wearing a simple blue button-up shirt. The choreography emphasises sharp arm movements, controlled footwork, and subtle facial expressions that perfectly sync with the song’s off-kilter rhythm.
Crucially, the dance doesn’t feel overproduced or staged — it looks casual, confident, and natural, which made it instantly relatable and endlessly rewatchable.
How the Meme Went Viral
@7lems7 Replying to @𝔇𝟷 Juice 𝔾𝕝𝕒𝕫𝕖𝕣🖤 i did competitive ballroom in high school fun fact also i am building a shelf so its messy 🩷
The clip began circulating on TikTok and short-form video platforms in early 2025, where users were immediately drawn to its unexpected charisma. Viewers praised Aidaev’s musicality — especially how his movements hit the beat drops and pauses in Assumptions with near-perfect timing.
As the video was reposted, it quickly detached from its original context and became a reaction meme. Users began pairing the dance with captions such as:
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“Me when I hear Assumptions come on”
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“When the beat changes but you’re still confident”
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“POV: you absolutely know what you’re doing (you don’t)”
The blue shirt became a visual shorthand. Even without text, audiences instantly recognised the meme from the posture, arm swings, and unmistakable groove.
A Dance, a Sound, and a Meme Format
@jerseyyjoe How we enter the function 😂🔥🔥 ( @Zeddy Will 🤠 & @LightskinMonte ) #assumptions #trend #viral #fyp
Within weeks, the meme evolved beyond the original clip.
Creators across TikTok and Instagram began:
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Recreating the dance
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Remixing the song into unrelated scenarios
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Editing the routine into films, games, and anime clips
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Using the sound ironically over awkward or confident moments
Despite countless recreations, the original video remained the gold standard, often reposted with captions praising how “nobody does it like Blue Shirt Guy.”
Unlike many viral dances, the humour wasn’t about exaggeration or comedy faces — it came from confidence, precision, and restraint, which made the meme feel cooler rather than chaotic.
Why Assumptions Blew Up Again
@fortnite You made the right assumption. New @samgellaitry emote is available in the shop. 🎵: @samgellaitry 💃: @blueshirtguy_me
The resurgence of Assumptions highlights how meme culture can completely redefine a song’s legacy. Originally released four years earlier, the track found a new generation of listeners through short-form video algorithms rather than traditional promotion.
Streams of Assumptions spiked significantly during the meme’s peak, with fans directly associating the song’s identity with the Blue Shirt Guy dance. In many cases, the meme became the primary way people discovered the track.
It’s a textbook example of how TikTok-era virality can revive older music — not through marketing campaigns, but through one perfectly timed, perfectly performed clip.
Blue Shirt Guy: A Modern Meme Icon
@brianmichaelhinds_ So strong nature had to intervene 🌪️ @blueshirtguy_me #blueshirtguy #whisk #samgellaitry #samba #pinkshirtguy
Ruslan Aidaev didn’t set out to create a meme — but his performance captured something rare: effortless confidence paired with impeccable rhythm. Like other iconic dance memes before it, the Blue Shirt Guy Assumptions Dance has transcended trends, resurfacing whenever nostalgia cycles back through social media.
What started as a simple dance video became a cultural reference point — one that proves internet fame doesn’t always come from spectacle. Sometimes, all it takes is a blue shirt, the right song, and absolute control of the beat.
And every time Assumptions plays, the internet still remembers exactly how to move.
