There are, at least, six artists known as Shannon: 1) A pseudonym of disco artist Brenda Shannon Greene.
2) A French melodic hard rock.
3) A Polish irish folk band.
4) A Finnish melodic metal band.
5) A Czech Republic Irish folk band.
6) A 60s UK band, best known for Abergavenny.
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1) A pseudonym of Brenda Shannon Greene (b. 1958 in Washington, DC, USA), the disco artist who released Let The Music Play (Jul 1983), hitting gold with this trend-setting, pulsating dance classic & others similar.

Read more about Shannon on Last.fm.