A 2009 file photo, released by Hard Rock Cafe of Alexa Ray Joel, daughter of singer Billy Joel.
Alexa Ray Joel's publicist Claire Mercuri won't say where the 23-year-old is staying. Billy Joel has homes in Manhattan and on eastern Long Island.
His daughter was hospitalised for several hours Saturday after police received a 911 call saying she had taken several pills.
Police say it is not clear whether she accidentally overdosed or attempted suicide.
On her MySpace page, Joel says she attended New York University for a short time before dropping out to focus on her music career.
