Los Angeles  - Global hip-hop star MIA and young Hollywood heartthrob Zac Efron have joined US President Barack and First Lady Michelle Obama on Time magazine's coveted list of The 100 Most Influential People in the World.

Los Angeles - The North American box-office rankings were topped over the weekend by the newly opened 17 Again, as the teen comedy starring heartthrob Zac Efron collected three-day ticket sales of 24.1 million dollars, according to preliminary studio estimates.

Los Angeles  - Zac Efron, star of teen hit High School Musical is determined to shed his squeaky-clean image.

For the cover of the latest issue of Interview magazine, a mud- covered Efron, 21, posed with a naked woman and said he was determined to shake up his career.