Forget the South Beach Diet, Martha's Vineyard Detox, Atkins and the rest. Sign me up for the Jake Gyllenhaal Diet. Earlier today Jake's main squeeze, Reese Witherspoon, appeared at a press conference announcing that she will be representing beauty brand Avon as their first Avon Global Ambassador. In other words, they're paying her to shill for them. Seriously though -- Avon be damned. Reese's natural love glow is better than any powder or pout plumper they put out.