Justin Bieber didn't give his full attention to his performance at the Victoria's Secret fashion show.

The 18-year-old singer admits he was partly distracted by the scantily-clad beauties at Wednesday (07.11.12) night's extravaganza in New York.

He said: ''I'm pretty focused. I'm like 98 percent focused. Two percent focus is on the chicks.''

While Justin is happily in a relationship with Selena Gomez, he didn't use the lingerie show as an opportunity to buy gifts for her.

He told 'Access Hollywood': ''No shopping for me.''

Meanwhile, Justin has announced he will be donating a percentage of ticket sales from a number of his 'Believe' tour dates to aid those affected by Hurricane Sandy.

He tweeted: ''chillin today. show day in Jersey tomorrow ... and proud to make this announcement.

''i have spoken to @AdamBraun from @PencilsofPromis and we donate a dollar of every ticket to charity from the #BELIEVEtour ... so ... We decided that for the Jersey, Brooklyn, and 2 MSG [Madison Square Gardens in New York] shows every ticket sold a dollar will be donated to Hurricane Sandy Relief.

''And all 4 shows are SOLD OUT so U are all helping us make a difference in the lives of those that need it right now. thanks. #GIVEBACK (sic)''