Justin Bieber serenades 9-year-old in London, Beliebers react relatively well

ff @1:00

lol @ her giving him her phone number

& performing Be Alright (new song):

& bringing another fan onstage/performing Boyfriend:

Justin will also be performing a free show in Mexico City tomorrow - more than 200,000 fans are expected to attend, and here's what the venue looks like now:

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