There are hundred upon hundred of upbeat Celtic songs out there. It's difficult to decide. I'd suggest that you listen a great deal of Celtic recordings. Don't know what you have listened to but there's a lot available out there.
Here's a quick list of "upbeat" song I perform (not all may be considered "Celtic." Hope it helps:
A Nation Once Again All For Me Grog Ancient & Old Irish Condom Anne Boleyn As I roved Out A-Soulin Australia's on the Wallaby Bachelor's Warning Ball of Kerriemuir Beer, Beer, Beer Biddy Mulligan Black Velvet Band Bold Jack Donohue Bold Tenant Farmer Bold Thady Quill Bonnie Lass of Fyvie-O Brennan On The Moor Broad Black Brimmer Changing Your Demeanour Chickens in The Garden Cobbler Come Out Ye Black & Tans Dear Boss Drink it Up Men Drunken Sailor Fare Thee Well Enniskillen Gallant 40 Twa Galway Races Garden Song God Bless England Green in The Green Gypsy Rover Haul Away Joe Heave Away Me Johnny He's Nobody's Moggy Hi For The Beggarman Holy Ground Home Boys, Home Irish Ballad Irish Rover Isn't It Grand Boys Johnny McEldoo Johnson's Motor Car Jolly Beggar Jolly Tinker Juice of The Barley Kelly, The Boy From Killane Kisses Sweeter than Wine Legion of The Rear Guard Little Beggarman Logger Lover Lord Nelson Mairi's Wedding Maloney Wants a Drink Mary Mack Master McGrath Mermaid Mick Maguire Mister Moses Ri-Tooral-I-Ay Moonshiner Morning Glory Mountain Dew Muirsheen Durkin My Old Man's a Dustman Nell Flaherty's Drake New South Wales Old Maid in The Garret Old Orange Flute Orange and Green Outlaw Rapparee Paddy West Paper and Pins Place in the Choir Plastic Paddy Pub With No Beer Ramble of Spring Ratlin Bog Red-Haired Mary Reilly's Daughter Rising of The Moon Rocky Road To Dublin Scotsman She Didn't Dance Skibbereen So Early in The Morning Soldiers of The Rear Guard Streets of Belfast They're Movin' Father's Grave Three Jolly Rouges of Lynne Tim Finnegan's Wake Too-A-Loo-Ra-Loo-Ral Unicorn Water is Alright in Tay Water is Wide Weela Wallia Whiskey Before Breakfast Whiskey In The Jar Whiskey on a Sunday Whiskey, You're The Divil Wild Colonial Boy Wild Rover William Bloat Zoological Gardens