Lopez 'to announce pregnancy at show'

Jennifer Lopez is expected to reveal that she is pregnant at a show tomorrow night, reports claim.

An insider told The Sun: "She will announce that she and Marc Anthony are expecting their first child on Saturday night at her Madison Square Garden concert."

The 'Do It Well' singer has repeatedly denied reports that she is due to give birth next spring.

But a fan machine lifted part of her top at a concert in the US last week, fuelling speculation that the rumours were true.

An onlooker told the New York Post: "A definitive baby bump was there. She was very quick to push down her top. Then she talked about how this year is full of firsts for her… and every so often her dress would fly up and you would see her belly."