John Hartson then sent in a powerful header but Marshall was right behind it.
And Cadete, Roy Keane, John Hartson and Andy Walker scored for the team of veterans.
Bellamy, 25, will now link up with Wales international team-mate John Hartson in a revamped Celtic attack.
BBC: SPORT | Football | My Club | Celtic | Celtic complete Bellamy loan deal
Celtic clinched their fourth league title in six seasons thanks to John Hartson's early goal against Hearts.
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Meanwhile, Jan Vennegoor of Hesselink has been an able replacement for John Hartson.
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Boruc was quoted in Polish newspapers as saying that John Hartson was lazy and Roy Keane acted like a star.
BBC: SPORT | Football | My Club | Celtic | Strachan plays down Boruc remarks
And Rush has joined Brian Flynn, John Hartson, Chris Coleman and Lawrie Sanchez in publicly declaring his interest in the job.
His day was complete when Shaun Fagan and James McFadden scored late goals and Celtic could not add to John Hartson's consolation.
Williams follows the likes of Ryan Giggs, Mark Hughes, John Hartson, Neville Southall and Craig Bellamy who have won the top award.
The pair combined in quick succession to create openings for first Carl Fletcher's left-foot shot and then John Hartson's header, but Dmitriy Kramarenko saved both.
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Former team-mate John Hartson said the death had left him "devastated".
Spurs ace Steffen Iversen was also mentioned and given Tottenham's late withdrawal from a deal to sign John Hartson, the timing of United's scuppered ambitions is uncanny.
But they have problems up front with John Hartson ruled out until March, Carl Cort struggling with a hamstring injury and Marcus Gayle about to depart on international duty.
Reading defender Adrian Williams is one of a number of injury doubts still named in the squad, while John Hartson, Mark Delaney and Rhys Weston are all omitted through injury.
Vladimir Smicer missed a great chance to score a third after Baros played him through, while at the other end John Hartson headed a McGeady corner wide of Kirkland's goal.
Gary Speed, Robbie Savage, Mark Delaney, John Hartson, Mark Pembridge, Andy Melville, Ryan Giggs and Jason Koumas have all quit Wales since Hughes left to take over at Blackburn in 2004.
Gary Speed, Robbie Savage, Mark Delaney, John Hartson, Mark Pembridge, Andy Melville and Ryan Giggs have all called time on their international careers since Hughes left to take over at Blackburn in 2004.
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