The National Enquirer reported that the former first daughter, 29, is tying the knot with Marc Mezvinsky, 31, in a secret 1-million dollar wedding this summer. However, a rep for the Clinton family has dismissed the rumours. "This report is false," Usmagazine.com quoted the rep, as saying. Clinton, who works for Avenue Capital Group and also helped mom Hillary's presidential campaign, and Mezvinsky, an investment banker at Goldman Sachs, have been dating since she split from Ian Klaus in 2005. They went public with their relationship in 2007. Mezvinsky is the son of former Iowa congressman Edward Mezvinsky and onetime...