Here's a short story:

LONDON, England (CNN) -- Troubled pop star Amy Winehouse spent the night in a London hospital after suffering a reaction to a medication she was taking at home Monday night, according to her spokeswoman. 

Amy Winehouse's husband was recently jailed for 27 months. 

Tracey Miller said she could not say what medication was involved. 

A statement from University College Hospital said Winehouse had been kept in overnight for observation. 

She had a comfortable night and was released Tuesday morning, the statement said. 

London Ambulance Service said it transported the singer after being notified of "an adult female taken unwell." 

Winehouse's spokesman in London, Chris Goodman, told the British Press Association that he had not been told what was wrong with the 24-year-old singer, who is well known for her song "Rehab," describing the singer's reluctance to enter a clinic. 

The pop singer was investigated this year after a London tabloid made public a leaked home video that showed her smoking something in a glass pipe minutes after she was heard saying she had just taken six tablets of the anti-anxiety drug Valium. Police declined to file charges. 

The singer has battled drug addiction and spent about two weeks in a rehabilitation clinic in January. 

Winehouse won five Grammy awards this year -- three for "Rehab" as well as Album of the Year and Best New Artist. 

Winehouse's Grammy winning album, "Back to Black," is still a big seller, recently charting at No. 12 in the UK more than 19 months after its release. Madame Toussaud's London wax museum recently unveiled a wax statue of Winehouse alongside Madonna, Jimi Hendrix, the Beatles, Justin Timberlake, Beyonce and other musicians in the museum's "Music Zone" exhibit.  (End of story)

Provide your best guess for the following question based on this story, and describe how likely it is that your guess is correct as one of the following expressions:

Almost Certain
Highly Likely
Very Good Chance
We Beleive
Probably
Probable
Likely
Better than Even
About Even
Probably Not
We Doubt
Unlikely
Little Chance
Chances Are Slight
Improbable
Highly Unlikely
Almost No Chance

Give ONLY the guess and your confidence, no other words or explanation. For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>
Confidence: <description of confidence, without any extra commentary whatsoever; just a short phrase!>

Here are a few examples of questions and answers:

Question: Who is the story about?
Guess: Amy Winehouse
Confidence: <appropriate level of confidence in this guess>

Question: Where did she spend Monday night?
Guess: in a hospital
Confidence: <appropriate level of confidence in this guess>

Question: Why was she there?
Guess: a reaction to a medication
Confidence: <appropriate level of confidence in this guess>

Now answer the following question in the same format.

Question: What medicine?

unknown