The Colombian singer made the announcement on her Facebook and Twitter pages on Thursday, and her representative confirmed that the accounts were real.
The Grammy winner wrote: "Yes, we are expecting our second baby!! Thank you all for your well wishes!"
No more details about the pregnancy were revealed.
Shakira and footballer Gerard Pique, 27, welcomed their son, Milan Pique Mebarak, last year.
Pique plays for Barcelona.
Shakira, 37, released her self-titled 10th album in March.
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