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Why are all these kids smiling? They probably just took a look at their bank accounts.

High School has definitely paid off big time for the stars of Disney's High School Musical franchise. How much you ask? Let's just say none of them will be hittin' up the local fast food outlet for a part-time job anytime soon.

    Zac Efron bagged the most cash. Forbes estimates the floppy haired heartthrob banked about $5.8 million since last June. That doesn't count what could be another big payday if the reports are true and he takes the lead role in a Footloose remake.

    Disney vet Ashley Tisdale isn't doing too bad herself. In addition to her work on HSM3 she's a regular on Phineas and Ferb and has deals with Ecko Red, T-Mobile and Degree Girl, earning her $5.5 million in last 12 months.

    Zac's on and off-screen girlfriend Vanessa Hudgens has used her HSM fame to launch a music career. She took home $3.2 million, with her income boosted by endorsement deals with Marc Ecko and Neutrogena.

Of course, Disney is really the one getting rich in all this. Forbes estimates the High School Musical franchise has earned the company more than $100 mil in pure profit.