This week on "Mad Men", they wanted to convince The Rolling Stones to write a jingle for Heinz baked beans. If you think it sounds ridiculous . . . so did a lot of people.  But it's NOT ridiculous, and here's proof:  In real life, the Rolling Stones recorded a jingle for Rice Krispies in 1963, and the company used it in a 1964 TV spot . . . but only in the U.K.