Martin bester loops in sa mega musician to give aspiring busker from fourways a bigger stage to pursue his dreams

I think there may be a few issues with the sentence you provided. Here's a breakdown:

• "martin bester loops" - I'm assuming this is a person's name, but I'm not familiar with a well-known person by this name.
• "in sa" - I'm assuming this is short for "in South Africa", but it's not a complete sentence.
• "mega musician" - This is a subjective term, but I'm assuming you mean a very successful or well-known musician.
• "to give aspiring busker from fourways a bigger stage to pursue his dreams" - This is a sentence that makes sense, but it's not clear how it relates to the first part of the sentence.

If you meant to say that Martin Bester, a South African radio personality, is helping an aspiring busker from Fourways, Johannesburg, to pursue their dreams, here's a rewritten sentence:

Martin Bester, a popular South African radio personality, has given a bigger stage to an aspiring busker from Fourways to pursue his dreams.

Please let me know if this is what you meant, or if I've misunderstood the sentence entirely!