PEOPLE IN BRIEF: Bristol Palin chooses to practice abstinence

NEW YORK -- Bristol Palin said that if girls knew how tough it was to be a mom, they'd think twice about having sex.

The 19-year-old daughter of former Alaska Gov. Sarah Palin said she has chosen to practice abstinence herself, until marriage.

Bristol Palin, who once said it was unrealistic to ask young people to abstain from sex, said in an interview with The Associated Press that it's realistic for her personally.

''I know it's realistic to ask myself that, because I know I'm not going to until I'm married,'' she said.

Palin gave birth to a son, Tripp, in December 2008.

Whitney Houston postpones more concert dates

NEW YORK -- Whitney Houston has again pushed back the European leg of her first tour in years on the advice of doctors who are encouraging her to take time to recover from a respiratory illness, according to a statement issued Wednesday.

Houston had already postponed the European kickoff, originally scheduled for Tuesday in Paris, because of illness. A statement from a representative said doctors advised Houston to reschedule concerts today and Friday in Manchester, England, and a Sunday performance in Glasgow, Scotland.

Tierney to return to show after breast cancer fight

NEW YORK -- Maura Tierney is making a return to TV after dropping out of a series last summer as she battled breast cancer, the FX network said Wednesday.

Tierney, best known for her longtime role on the NBC drama ''ER,'' will resume her guest spot as the love interest of Denis Leary's firefighter character on the FX action drama ''Rescue Me,'' the cable network said.

The 45-year-old actress is filming four episodes scheduled to air in 2011, the series' seventh and final season.