There are multiple artists with this name:

1) Apollo was fronted as one of the young and hopeful Norwegian hip-hop artists when he released his debut album. This was when Norwegian rap was relatively new (at least successfully) and many believed his flow would make Apollo the most successful in time. Unfortunately he waited many years before releasing his second album and never quite reached the top. His albums are considered good ones, though he didn't make the hall of fame. He's maybe biggest hit was the sample of Janicke "J-Diva"'s "Svake Mennesker".

2) Apollo is also a Finnish rap artist from Lahti.

3) Apollo was formed in 1969. They released one album, Apollo (1970). Their music was occasionally heavy and the band sounds like Led Zeppelin or Procol Harum, with little bit King Crimson in it. Members have been in other Finnish progressive projects.

4) Apollo is an unsigned singer/songwriter from London, England who has received some following on social networking site Myspace.