Pepsi is bringing "Joy of Pepsi" ba, ba, ba, ba back. A spot debuting during tonight's episode of Fox's "Empire" includes a remake of an old spot in the classic campaign, which includes the sung phrase "Ba Ba Ba Ba Ba." The mnemonic was last widely used in a "Joy of Pepsi" ad starring Britney Spears that ran in 2001. But Pepsi subtly brought the saying back earlier this year at the end of ads for its ongoing "Live for Now" campaign.