United Kingdom, July 5 -- Tiffany "went into sadness" at the height of her fame.

The 53-year-old pop star enjoyed huge success with her cover of the Tommy James and the Shondells track I Think We're Alone Now in 1987, but recalled that she didn't really know how to "unwind" after major performances at a time when others in her field would often turn to drugs or alcohol.

She told The Guardian: "Naturally, my career became a little more intense after I got successful. There were compromises to be made, and it was isolating, because I was travelling all the time without family, friends or the routine of school. I was a teenager, up at the crack of dawn, doing promo all day, off to shows at night and then . goodnight! The band and crew woul...