By Ian Youngs
BBC News entertainment reporter at Glastonbury
Chris Martin criticised cynical attitudes towards Live 8
Glastonbury fans declared Coldplay's festival headline slot a huge success on Saturday as the group cemented their position as Britain's biggest band.
The 90-minute set included a cover of Can't Get You Out of My Head by Kylie Minogue, who pulled out after being diagnosed with breast cancer.
One of the most memorable festivals of recent years ends on Sunday with Basement Jaxx topping the line-up.
Bob Geldof rallied fans on Saturday as they battled mud after Friday's floods.
The Saturday headline slot is one of music's most prestigious gigs and the Pyramid Stage field was packed for Coldplay's show.
"I was at U2 last week and I think that [Coldplay] was loads better," said Stuart Hutchison, 24, from Bristol.
He said: "I was expecting it to be good but it was 200% better than I thought."
Terry O'Sullivan, 24, from Twickenham, London, said he did not usually go to live music events but was impressed by Coldplay.
"I've never been to anything like this before, but I loved it," he said.
Emma Skakle, 20, also from Bristol, said singer Chris Martin was "really chilled out but not too pretentious".
Martin paid tribute to Kylie Minogue, who is recovering after undergoing surgery in Australia.
"Everyone's paid to see Kylie as well, so shouldn't we salute absent friends?" he said before launching into a version of her number one hit.
Martin adapted some of his own lyrics for Glastonbury, singing about "mud up to your knees" in Politik and turning a line in Everything's Not Lost into: "If your tent gets lost."
He praised fans for "waiting around in this crazy weather", adding: "We appreciate it more than you imagine."
Martin also thanked Michael Eavis by writing the festival organiser's name on his knees.
His only mention of Make Poverty History and the G8 summit was a brief comment about next week's Live 8 concerts, hitting out at "all the people who are cynical about it".
Covered in mud
Earlier on Saturday, Live 8 organiser Bob Geldof addressed the Glastonbury crowds, asking them to hold hands in a show of support for the campaign to combat poverty in Africa.
Bob Geldof asked the fans in the crowd to join hands
"I want you to individually believe you can change the condition of the most put-upon and beaten-down people on this planet," Geldof told the crowd.
He said: "I want you to grab the hand of the person beside you. Not as some big hippy rock festival thing, but because you want this to happen. Lift your hands and say together, 'make poverty history'."
Saturday's other musical highlights included New Order, Keane, Razorlight, Kasabian and Baaba Maal.
On Sunday veterans including Van Morrison and Brian Wilson will join rockers Garbage and Primal Scream on the Pyramid Stage line-up before dance stars Basement Jaxx close the show.
The Somerset site is still covered in mud after Friday's torrential downpours, which left 200 tents submerged in up to eight feet of water.