- Photo: Evan Agostini/Invision/AP1 of 8
- Photo: Daniel Deme/WENN2 of 8
- Photo: WENN.com/WENN3 of 8
- Photo: WENN.com/WENN4 of 8
- Photo: Peter Kramer/Invision/AP5 of 8
- Photo: John Shearer/WireImage.com6 of 8
- Photo: Ron Asadorian/Splash News7 of 8
It's a story that has ugly celebrity scandal written all over: The famous rocker-husband of an Oscar-winning actress enjoys a public make-out session with a blond starlet.
It's also a story that could result in legal action.
Chris Martin, aka Gwyneth Paltrow's more musical half, and Kate Bosworth are preparing to take on Star over a report in its latest issue that contends the two were spotted locking lips at a U2 concert in Las Vegas on Oct. 23.
"I couldn't believe my eyes," a spywitness purports to the tab. "There was Chris totally making out with Kate in front of other people. At first I thought it might be Gwyneth, but when she came up for air, it was clear the woman was Kate!"
Continues the seemingly traumatized onlooker, "They weren't even shy about it … they held hands and kissed."
The PDA accusation has produced swift denials all around.
"This story is completely fabricated," Bosworth's rep insists to Wonderwall. "Lawyers for both Kate and Chris are pursuing their remedies against Star magazine as we speak."
Paltrow's spokesman also dismisses the report, telling us, "The story is another fabrication."
(And considering that Gwyneth and Chris, who are parents to Apple, 5, and Moses, 3, have long avoided being photographed together, we have a hard time buying that he's suddenly become so indiscreet.)
So, what touched off the tabloid item?
A source explains to Gossip Cop that Kate, who was most recently linked to easy-on-the-eyes "True Blood" star Alexander Skarsgard, is a "great friend" of both Gwyneth's and Chris' and "has been for years."
But, the mole insists, there is nothing at all "romantic" about Bosworth's association with the Coldplay front man.
Read more Hot Gossip
Single & Fabulous
Check out Kourtney Kardashian's fabulous life on social media in the wake of her breakup from Scott Disick on today's Celebs Gone Social.Watch Video »
Check out Jennifer Lopez's best ab moments!Watch Video »
From Nicole Richie to Miley Cyrus, check out these embarrassing celebrity bikini malfunctions!Watch Video »
Tom Cruise chats "Mission: Impossible - Rogue Nation" with Wonderwall.com.Watch Video »
Check out Instagram newcomer Rachel Bilson's best posts thus far on today's Celebs Gone Social.Watch Video »
DIY Celeb Makeup
We show you how to get Taylor Swift's blue eye shadow look on "DIY Celeb Makeup."Watch Video »