Fergie admits she gets sick of performing the same songs night after night but fans stop her getting stuck in a rut.
The 39-year-old singer's group reached the height of their popularity in 2009 when their two singles 'Boom Boom Pow' and 'I Gotta Feeling' topped the US charts for a total of six months and even the frontwoman got tired of hearing their songs, though she claims the experience was saved by fan reactions.
She said: ''When you perform songs every night, you do tend to get sick of listening to yourself.
''But at the same time, what takes you out of that is the audience, because you get out of your own psyche and into their vibe.''
During Black Eyed Peas shows, Fergie was able to show off her gymnastics skills as well as her vocal talents and says the unusual performances stemmed from vocal battles between herself and Will.i.am.
She explained: ''During the song 'Shut Up' on the Black Eyed Peas tour, we'd have fun with it and Will and I would do all these weird vocal battles. I hit a really high note so he did a breakdancing move, so I just spontaneously pulled that move [a front flip] out of my gymnastics training.
''I remembered I could do it one-handed, so I put the mic in the other hand and there it started. Once I did that, the audience wanted to see it every night, so I just kept on doing it.''
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