Cassie has been hospitalized with a stomach virus.
The Me & U singer raised fears for her health on Thursday night (12Jul12) after posting a photo of an intravenous tube inserted into her arm on her Twitter.com blog.
The accompanying caption read: "This stomach virus is no joke! At least my sneakers match my IV."
Cassie, 25, is believed to have spent the night under doctors' care for observation, but she is already bouncing back from her illness and plans to honor an appearance in Las Vegas on Saturday (14Jul12).
In a tweet on Friday (13Jul12), she writes, "So excited to be in Vegas hosting StereoSaturdays! Come out and say hi tomorrow!"