Police in London say that YouTuber Marina Joyce is "safe and well" after fans said they were worried about her welfare.
The 19-year-old has also tweeted: "I'm totally fine guys."
It's after the hashtag #savemarinajoyce trended this morning on Twitter.
Concern spiked after she posted a message inviting fans to a morning party in Bethnal Green in east London. Some fans thought she was being "held captive".
Others have talked about her apparent strange behaviour in videos and the fact she's sometimes repeated herself.
The 19-year-old largely makes beauty blogs.
Marina has also spoken to fans via a live stream.
Marina has approximately 600,000 subscribers to her YouTube channel.
Fans have discussed their concerns over what they say is a "change in her behaviour" in her videos.
There are even claims she's been "forced" to make some of her clips.
On Tuesday, Marina tweeted about a morning party called "Morning Gloryville" at the Oval Space in Bethnal Green, scheduled for 3 August according to Facebook.
It's where people go "healthy raving" early in the morning.
But a message on Tuesday night led to huge confusion about the event and her whereabouts.
Further concern was prompted when another message followed.
A number of YouTube stars then urged fans not to go to east London at 6.30am.
Find us on Instagram at BBCNewsbeat and follow us on Snapchat, search for bbc_newsbeat