An event such as Sunday’s “Radio Disney Live!” festival in Irvine makes it tough to distinguish between musical performance and sales pitch. So jammed was it with cross-promotional marketing ...

The 24-year-old Radio Disney platform, which popularized home-grown acts from the Jonas Brothers to Selena Gomez, is a casualty of evolving technology and a shifting corporate focus at Disney.

The network celebrates its anniversary with a pop blowout for the 10- year-old set. Jesse McCartney is the hit of the evening.