Carrie Underwood's Secret to Avoiding Pregnancy Rumors

By Dahvi Shira

04/01/2011 at 06:20 PM EDT

Enjoying her married life with hubby Mike Fisher, Carrie Underwood has no plans to have kids anytime soon – and doesn't want to be bothered with speculation that she has a baby on the way.

"I don't want people assuming that I am [pregnant] until I say that I am," the country crooner told PEOPLE on Thursday, while promoting her debut film Soul Surfer in L.A. "We just got married. We haven't been married a year yet. I would want to be married for a little while [before having kids]."

No stranger to paparazzi, Underwood says she has a foolproof way of being photographed without looking like she's sporting a baby bump.

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"[I] choose my wardrobe differently because when I wear something a little baggier, I'm like, nope, people are going to think I'm hiding something, so I better not wear that," she explains. "So it does make me kind of think a little extra."

Now that Fisher, 30, has been traded from the Ottawa Senators hockey team to the Nashville Predators, the formerly long-distance newlyweds just want to spend quality time alone with each other.

"Now we're just having fun, and we should," Underwood says with a smile. "I'm 28. I'm not a lot older and like, need to have kids now. We have plenty of time."