uk Dublin Justin Bieber singing concert

uk Dublin Justin Bieber singing concert Willow Smith

These kids probably have more stamps in their passports than most grown adults!

Justin Bieber and Willow Smith continued to rock it out in the UK, and we bet the kids overseas were ecstatic to see their favorite American pop stars in action.

Bieber's world tour has taken the lucky guy from Milan, to Paris to Sydney, but it seems Dublin has left quite an impression on the mini mogul. On Monday, countless screaming Irish female fans closed down parts of a main street after a rumor circulated on Twitter "The Biebes" was shopping there.

The singer had two shows at Dublin's 02 this week where he announced to his Irish Biebetes, "What I like most is to make you smile." Awwww.

Willow Smith is the opening act for Justin, but she's gotten so big herself, she'll have her own show in no time. Will Smith's little girl had a huge crowd waiting outside her hotel on Tuesday in Dublin, waiting to see the little Whip My Hair singer make her way to the O2 Arena.

Willow and Justin will head to the U.K. for more shows, after wrapping up their final show in Dublin Wednesday.