What song on the album No Protection was a No. 1 in the "Billboard" Hot 100 in April 1987?
Nothing's Gonna Stop Us Now:  Featured as the theme to the romantic comedy film "Mannequin", it hit No. 1 in the "Billboard" Hot 100 on April 4, 1987 and reached No. 1 on the UK Singles Chart for four weeks the following month and became the UK's 2nd biggest selling single of 1987.
i don't know