Actress Emma Watson arrives for the preview party of the Vanity Fair Portraits exhibition at Britain's National Portrait Gallery in London February 11, 2008.

Actress Natassia Malthe, of Norway, arrives for the preview party of the Vanity Fair Portraits exhibition at Britain's National Portrait Gallery in London February 11, 2008.

Singer Annie Lennox arrives for the preview party of the Vanity Fair Portraits exhibition at Britain's National Portrait Gallery in London February 11, 2008.

Singer Lily Allen arrives for the preview party of the Vanity Fair Portraits exhibition at Britain's National Portrait Gallery in London February 11, 2008.

Actress Emma Watson arrives for the preview party of the Vanity Fair Portraits exhibition at Britain's National Portrait Gallery in London February 11, 2008.