Most Americans don't have to wait until they're retired to know that Social Security benefits won't be enough to maintain their current lifestyle. If they pay any attention to retirement planning advice, they know they will need other sources of income as well. Investing in dividend stocks is one great way to generate additional income.

Three Fool.com contributors were asked to discuss some great income stocks that they think retirees should love. They picked (NYSE: ABBV), Johnson Johnson (NYSE: JNJ), and Pfizer (NYSE: PFE). Here's why.

Keith Speights (AbbVie): There's no question that AbbVie is entering into a new era in its history. The big drugmaker can no longer depend on Humira to generate solid growth. Sales are declining for the blockbuster autoimmune-disease drug as it faces competition from biosimilars.

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Source Fool.com