'I though they only hired 19-year-old models!': Jennifer Lopez, 48, stuns at Guess party with Alex Rodriguez as she says she feels 'powerful' to front new campaign.<br /><br />Jennifer Lopez was in full diva mode on Wednesday night at an event celebrating her Spring 2018 campaign for Guess.<br />The 48-year-old singer put on a busty display in a very pale blue strapless dress with a matching fluffy duster as she posed next to boyfriend Alex Rodriguez.<br />And during a taped speech shown inside the splashy event, the icon said she thought the brand only hired 19-year-old models and was surprised that they wanted her. <br /><br />
