Higdon is joint top-scorer in the Clydesdale Bank Premier League with 19 goals, alongside Inverness forward Billy McKay and Leigh Griffiths of Hibernian, who visit Fir Park on Friday night.
Ojamaa only has two goals this season but he is joint top of the SPL assists table with 12, a position he shares with Caley Thistle winger Aaron Doran.
Ojamaa said: "It speaks volumes for the team and our attacking performance when Higgy is top goalscorer and me and Doran are top assists.
"That shows how good we are going forward and how well we have done this season. It's a credit to all of us.
"Michael has had a great year. It's a great fit with Michael.
"I think his first-time finishing is definitely the best I have ever played with.
"With the flair players we have around him such as myself, Nicky Law, Chris Humphrey, we had Murph (Jamie Murphy) before and now we have Faddy (James McFadden), Kallum Higginbotham, everybody can really complement him and create chances for him and he is just great at putting them away.
"We are very lucky to have him and he has had a great goalscoring season."