Show the number of unread items just like in the Mail app

I am making an iPhone Application which has a list of RSS Feeds, and I want to show a blue bubble on the left with the number of unread articles (one bub开发者_高级运维ble per feed), just like in Mail app, as shown here:

Does anyone know if this is possible with Cocoa Touch, or must I add a UILabel?

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If I must use a UILabel, then how do I make it round, and make it's background color invisible when the row is selected?

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Thanks!

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Have at look at TDBadgedCell