Pink, 31, and her husband Carey Hart, 35, are reportedly expecting their first child, although the rock singer has not commented publicly.
"She's 12 weeks along," Us Weekly quoted a source close to the matter as saying. "She wanted to do it between tours, when she has some time off."
Pink began her European tour, the carnival themed "Funhouse Summer Carnival Tour" that is based off her Funhouse album, in May.
She and Hart, a motocross racer, married in Costa Rica in 2006 and announced in 2008 they had split, but never separated legally. Pink confirmed on "The Ellen DeGeneres Show" in May that she and Hart were back together.
"Pink was determined to make the relationship solid," the source told Us. "Now she's really happy, and she's excited she got pregnant so fast! She'll be a brilliant mother."