"Let me out." The message from Pamela Anderson was clear today as the 53-year-old bombshell and "Baywatch" alum updated her Instagram. Pamela, followed by 1 million and generally up for fun and games, was, however, throwing out a more serious side behind her skimpy Thursday post. The Canadian-born star was shouting out PETA – Pamela, herself a vegan, has long been supporting and fronting charity PETA: People for the Ethical Treatment of Animals. Check out the star's latest photo below.