Jennifer Lopez has no problem with the idea that Beyonce supposedly lip-synched "The Star Spangled Banner" at President Obama's Inauguration.  Speaking to Jon Stewart Tuesday night on The Daily Show , the singer and actress explained that technical reasons are usually why a performer will choose to sing to a pre-recorded tape.

"Sometimes it happens, when you are in certain stadiums and certain venues and stuff, they do pre-record stuff because you're going to have that terrible slap-back," says J-Lo, referring to the echo that occurs when sound travels long distances and then bounces back.  That phenomenon makes it hard for a performer to hear or himself, and it's the reason most Super Bowl performers lip-synch.

Jennifer then cited the most famous example of a performer with a great voice who nonetheless chose to lip-synch, telling Stewart, "If I remember correctly...I think Whitney Houston ['s rendition of "The Star Spangled Banner"] was also recorded...and everybody loved it.  It became such a huge hit."

Asked by Stewart if she herself had ever lip-synched because it's so hard to sing and dance at the same time, Jennifer replied, "You know, you do.  There [are] times.  All performers do have to do it at some point."

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