Every time Amal Clooney steps out, we question whether some sort of age-reversal machine actually exists. While we're sure it all boils down to great genes (and a facialist on speed dial), we recently learned a secret to her age-defying skin - nd no, it's not some overpriced product that makes our wallets scream. It's actually a $30 serum on Amazon. According to beauty brand Charlotte Tilbury, the 47-year-old prepped for the Justice's Annual Albie Awards by using its Magic Face Serum Crystal Elixir.