Jennifer Lopez Stepping To The 'Late Show With David Letterman'

Jennifer Lopez is stopping by The Late Show with David Letterman to promote her latest movie, The Back Up Plan, which was filmed in NYC last summer.In the romantic comedy, Jennifer plays a woman who conceives twins through artificial insemination, only to meet the man of her dreams (Alex O’Loughlin) on the very same day.The Back Up Plan opens nationwide on Friday.Jennifer Lopez arriving @ the '