mother have been gone viral in Latin American media for weeks.
"As some of you may know, Gerard and I are very happy awaiting the arrival of our first baby!" Shakira said in a statement on her website.
"At this time, we have decided to give priority to this unique moment in our lives and postpone all the promotional activities planned over the next few days."
The Grammy award-winning diva did not indicate when the baby is due to be born.
The Whenever, Wherever and Hips Don't Lie singer said she would not participate in the iHeartRadio Music Festival on Friday and Saturday in Las Vegas.
"But I'm sure this weekend in Las Vegas will be spectacular and I will be closely following everything that happens there!" she added.
Singer Shakira embraces her boyfriend, Barcelona's player Gerard Pique, during her concert in Barcelona in this May 29, 2011 file photo. (Reuters Photo)
"I'd like to thank Clear Channel and my fans for their constant love and understanding. Big kiss! And will see you very soon!"
This will be the first child for Shakira, 35, and Pique, 25, who confirmed their relationship in March 2011.
Pique, a center-back for FC Barcelona, will be out for two to three weeks after hurting his left foot in his side's 3-2 win at home to Spartak Moscow in the Champions League, the club announced earlier.
His Twitter page featured a graphic of a pacifier, with a link to Shakira's message.
In a bid to quell the pregnancy rumors, the belly-dancing singer's father, William Mebarak, himself spoke out in June to deny the "absolutely false" claims.
NBC television announced on Tuesday that Shakira would temporarily replace pop singer Christina Aguilera as a judge on season four of reality talent show "The Voice," along with R&B singer Usher, who will sit in for Cee Lo Green.
The pregnancy announcement comes as Shakira's former boyfriend and agent Antonio de la Rua of Argentina is suing her over contracts that were pending after their 2010 breakup.
Colombian media say De la Rua, son of a former president, sued her seeking $250 million and real estate they shared during their 11-year relationship.
Shakira is also a known humanitarian. When she was just 18 years old, the native of the industrial port city of Barranquilla launched the Pies Descalzos Foundation, dedicated to helping Colombian children hit by poverty and displacement.
She is also behind the US-based Barefoot Foundation, a global effort that aims to make universal education a reality for disadvantaged children, and has partnered with the United Nations Children's Fund, or UNICEF, and the Global Campaign for Education.
Shakira, who spends time in Miami and in Spain, was named to the President's Advisory Commission on Educational Excellence for Hispanics, a committee created by US President Barack Obama to expand access to high quality education for Hispanics.