Passage: Madonna entered mainstream films in February 1985, beginning with a brief appearance as a club singer in Vision Quest, a romantic drama film. Its soundtrack contained two new singles, her U.S. number-one single, "Crazy for You", and another track "Gambler". She also played the title role in the 1985 comedy Desperately Seeking Susan, a film which introduced the song "Into the Groove", her first number-one single in the UK. Her popularity relegated the film as a Madonna vehicle, despite not having lead actress billing. The New York Times film critic Vincent Canby named it one of the ten best films of 1985.Beginning in April 1985, Madonna embarked on her first concert tour in North America, The Virgin Tour, with the Beastie Boys as her opening act. She progressed from playing CBGB and the Mudd Club to playing large sporting arenas. The tour saw the peak of Madonna wannabe phenomenon, with lots of female attendees dressing like her. At that time, she released two more hits, "Angel" and "Dress You Up", making all four singles from the album peak inside the top five on the Hot 100 chart. In July, Penthouse and Playboy magazines published a number of nude photos of Madonna, taken in New York in 1978. She had posed for the photographs as she needed money at the time, and was paid as little as $25 a session. The publication of the photos caused a media uproar, but Madonna remained "unapologetic and defiant". The photographs were ultimately sold for up to $100,000. She referred to these events at the 1985 outdoor Live Aid charity concert, saying that she would not take her jacket off because "[the media] might hold it against me ten years from now."

Question: In what country was Into the Groove a top hit?
the UK