Ter Horst began modeling when she was nineteen, posing regularly as a Page 3 girl for two of Great Britain's best-known tabloids, The Sun and the Daily Star. She was voted sexiest model of the century in the Dutch edition of Playboy magazine. She has appeared on six Dutch Playboy covers and been featured in at least fifteen Playboy Special Editions, as well as in Penthouse, Perfect 10, and other softcore pornographic magazines.