Jennifer Lopez is in full baby-shopping mode, picking up matching pink and blue Tuni & G onesies from Petit Tresor in Los Angeles.

Which raises the question: Could the singer and husband Marc Anthony be having ... a boy and a girl?

Lopez waited awhile before even confirming the pregnancy – and the pop star has been mum about whether she is expecting twins, though multiple sources have told PEOPLE she is expecting two bundles of joy. The 38-year-old singer recently denied reports that she'd had a pregnancy health scare that forced her to cut back on touring.