A maroon-like mark on Taylor Swift's neck led some fans to speculate that her NFL star boyfriend, Travis Kelce, left her a hickey.

"Taylor was bitten by a vampire," a TS fan account tweeted on Saturday, with a video of the multi-Grammy-awarded singer performing on stage in Stockholm, Sweden, in her sparkly blue dress.

"Travis out here marking his territory," the text on the video read.

RELATED: PHOTO: Some Fans Convinced Taylor Swift Left A 'Hickey' On Travis Kelce's Neck

The video clip has since gained over 340,100 views on X, formerly Twitter. It also generated over 1,000 retweets, 6,600 hearts and 220+ responses.

"My god, they are really [like] high school[ers]," wrote one netizen.

"The vampire in question," another tweeted alongside a compilation of Kelce's photos.

"Travis Kelce had [a] big appetite. He gave Taylor Swift something -- a large hickey. Holy. Travis misses her too much," claimed a different person.

RELATED: Taylor Swift, Travis Kelce Kiss And Dance To Her Song 'Love Story' After Super Bowl Win [Watch]

"Now, Miss Taylor Alison Swift, is that a hickey on your neck, or did you 'burn yourself with a hair straightener?'" tweeted someone else.

Meanwhile, a different commenter opined, "Such a great team of makeup artists and there wasn't ONE to cover it?"

Before the sighting of the alleged hickey, Taylor and Travis reportedly spent time together on a three-night-holiday in a $21,000-per-night villa in Lake Como, Italy, following the "1989" artist's tour stop in Paris, according to Page Six.

The pair reportedly stayed at the opulent Villa Sola Cabiati, which features six suites and amenities such as a private pool, arabesque gardens, a massive foyer and walls lined with museum-quality paintings, among others. The suite also includes the service of a butler, housekeepers, a chambermaid and a private chef, per the outlet.

In some photos that surfaced on X, the two were photographed having a romantic outdoor dinner outside the Lake Como villa they reportedly stayed in.

The lovebirds were also spotted getting cozy with each other and sharing a kiss during a boat ride in Lake Como. The Super Bowl champ was wearing a checkered sweater, while Taylor sported a light-brown coat.

Per People, the boat ride took place last Friday. It came after the two were spotted walking around Lake Como.

Travis has been reportedly showing his support for his girlfriend, Taylor, through his visits to her "The Eras Tour" stop locations.