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. 

Based on the article and the following list of answers, write a list of questions.

1. Amy Winehouse
2. in a hospital
3. a reaction to a medication
4. unknown
5. Tuesday morning
6. Rehab
7. the singer's reluctance to enter a clinic
8. a wax statue of Winehouse
9. drug addiction
10. a rehabilitation clinic
11. about two weeks
12. Back to Black
13. No. 12

Numbered questions:
1. Who is the story about?
2. Where did she spend Monday night?
3. Why was she there?
4. What medicine?
5. When was she discharged?
6. What is the title of her popular song?
7. What does it describe?
8. What was shown to the public this year?
9. What does she battle?
10. Where was she at in the beginning of the year?
11. For how long?
12. What is at the top of the charts?
13. What was it ranked?