Prosecutors allege Diezani Alison-Madueke was given "a life of luxury" in the UK by people interested in Nigerian government contracts.
Reigning champion Tigst Assefa will target a repeat of her record-breaking London Marathon victory when she takes on rivals Sifan Hassan and Peres Jepchirchir in this year's race.
Ghana's foreign minister says the influencer is a "worthy ambassador", but some Ghanaians criticised the move.
Abena Christine Jon'el has made Ghana her home and aims to raise the profile of people with disabilities.
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