12/07/2007 at 03:55 PM EST
is in full baby-gift mode, scoring matching pink and blue Tuni & G
onesies from sister Lynda Lopez at 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 a while before even confirming the pregnancy – and the pop star has been mum about whether she's expecting twins, though multiple sources have told PEOPLE she's 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.