GWYNETH TO APPLE: BE A STAR!

Nepo baby Apple Martin, daughter of Coldplay frontman Chris Martin, 48, and Oscar winner Gwyneth Paltrow, made a wobbly singing debut in a surprise appearance with the band Jade Street in Nashville in late October.

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The response e was harsh. "She sounds a hot mess," wrote one commenter on a clip of the performance, while another opined, "A voice only a mother could love." Indeed, despite the Vanderbilt University senior's brutal reception, a source tells Star Gwyneth, 53, is in fact pushing the the 21-year-o